Having some issues with restoring my service. I'm rooted on Lineage 15.1. I can not edit the apn settings that were preloaded. I have spotty 4G and never cell service. I've been told deleting my modemst1 and modemst2 files that it will force the modem settings to be re-written as per new sim card settings. When i try fastboot delete modemst1 or 2 i get "Failed cannot erase in an unlocked state". So i locked the bootloader back up and tried again and this time i get "Failed cannot erase in a locked state". What would be the proper way to delete these settings? How else may i restore my data+phone service?
You should not need to delete those files and I'd recommend leaving them alone. If those are files outside the data and system partitions, screwing up those partitions will require you to flash stock image with LGs software restore, which can be a ***** to get going if you're not too familiar in dealing with the quirks to getting everything done right and successfully flash stock images. You'll pull some hairs out for sure.
Have you tried simply resetting the APN to default? When you do, you should get a long list of potential carriers and you can then select the Tmobile APN from it. But I avoid that process altogether and simply created a new APN using Tmobile info even with having an active Metro SIM installed.
You should get some service even if 3G only. It may just be your area isn't too great for Tmos 4G. But no service or data at all is usually due to bad SIM, incorrect APN settings, or modified/corrupt phone data. If you've tinkered with those other modem partitions in recovery or fastboot, you might as well plan to take a few hours to find all the files you'll need and set up the programs on your PC to prepare and flash LG stock image because LG restore is the only way you'll get to rewrite those untouchable phone partitions with the correct hardcoded phone data.
That is exactly what i am trying to do actually. My K20 was granted Permanent unlock years ago, It doesnt ask for a unlock pin with new sims. However no matter how many times i reset the APN's, I only can connect via 4G. I do not have Voice Service. I need to restore the stock image. Which i have i had a MP260, I have flashed the TP260 stock image successfully, I am even running LOS 15.1 without any issues other than i can not make calls.
mario0318 said:
You should not need to delete those files and I'd recommend leaving them alone. If those are files outside the data and system partitions, screwing up those partitions will require you to flash stock image with LGs software restore, which can be a ***** to get going if you're not too familiar in dealing with the quirks to getting everything done right and successfully flash stock images. You'll pull some hairs out for sure.
Have you tried simply resetting the APN to default? When you do, you should get a long list of potential carriers and you can then select the Tmobile APN from it. But I avoid that process altogether and simply created a new APN using Tmobile info even with having an active Metro SIM installed.
You should get some service even if 3G only. It may just be your area isn't too great for Tmos 4G. But no service or data at all is usually due to bad SIM, incorrect APN settings, or modified/corrupt phone data. If you've tinkered with those other modem partitions in recovery or fastboot, you might as well plan to take a few hours to find all the files you'll need and set up the programs on your PC to prepare and flash LG stock image because LG restore is the only way you'll get to rewrite those untouchable phone partitions with the correct hardcoded phone data.
Click to expand...
Click to collapse
What i was trying to say was that i agree with you. I am not trying to mess with those individually. My apn settings have gotten mixed up. I am connecting to cell towers, but i do not have voice service. . SO i am trying to fix those completely.
So you have data service and can access the web and whatnot with 4G speeds, not cannot make or receive calls and text messages?
Correct. I can however check my voicemail successfully from the device.
mario0318 said:
You should not need to delete those files and I'd recommend leaving them alone. If those are files outside the data and system partitions, screwing up those partitions will require you to flash stock image with LGs software restore, which can be a ***** to get going if you're not too familiar in dealing with the quirks to getting everything done right and successfully flash stock images. You'll pull some hairs out for sure.
Have you tried simply resetting the APN to default? When you do, you should get a long list of potential carriers and you can then select the Tmobile APN from it. But I avoid that process altogether and simply created a new APN using Tmobile info even with having an active Metro SIM installed.
You should get some service even if 3G only. It may just be your area isn't too great for Tmos 4G. But no service or data at all is usually due to bad SIM, incorrect APN settings, or modified/corrupt phone data. If you've tinkered with those other modem partitions in recovery or fastboot, you might as well plan to take a few hours to find all the files you'll need and set up the programs on your PC to prepare and flash LG stock image because LG restore is the only way you'll get to rewrite those untouchable phone partitions with the correct hardcoded phone data.
Click to expand...
Click to collapse
mario0318 said:
So you have data service and can access the web and whatnot with 4G speeds, not cannot make or receive calls and text messages?
Click to expand...
Click to collapse
I wouldnt come to think that being able to call your VM and have mobile data that the issue is your APN. If anything it would be proof that it's set up properly. If you can call your voicemail, which is a phone number, that means your phone should be able to make calls. There's no reason it would deny making or receiving calls because the very fact you can access VM mobile data means your phones cell radio is working and connected to a tower.
The issue may actually be between the phone and the carrier. You mentioned you've switched out several SIM cards to test the phone right? Is it possible the carrier needs to activate or register your phone on their end to establish full features? I've known of similar issues when switching phones using the same SIM where data and some telephony is immediately available but limited in some way, like being able to make calls but not text, or able to receive texts but not send while being able to make and receive calls. Or able to send and receive calls and text but no data.
Just curious, can you post what your current APN settings are?
I tried to get a good screenshot of my apns. They were locked and i couldn't add either. I am starting to think the problem maybe that i had a SIM card installed when i flashed the OS.
mario0318 said:
I wouldnt come to think that being able to call your VM and have mobile data that the issue is your APN. If anything it would be proof that it's set up properly. If you can call your voicemail, which is a phone number, that means your phone should be able to make calls. There's no reason it would deny making or receiving calls because the very fact you can access VM mobile data means your phones cell radio is working and connected to a tower.
The issue may actually be between the phone and the carrier. You mentioned you've switched out several SIM cards to test the phone right? Is it possible the carrier needs to activate or register your phone on their end to establish full features? I've known of similar issues when switching phones using the same SIM where data and some telephony is immediately available but limited in some way, like being able to make calls but not text, or able to receive texts but not send while being able to make and receive calls. Or able to send and receive calls and text but no data.
Just curious, can you post what your current APN settings are?
Click to expand...
Click to collapse
use gravity box for whatever version and change carrier stuff i did ive hacked hotspot for 10 and a few other things this should help try project fi apn after
ecompton59 said:
use gravity box for whatever version and change carrier stuff i did ive hacked hotspot for 10 and a few other things this should help try project fi apn after
Click to expand...
Click to collapse
GravityBox on the LG K20 Plus, I believe for both stock rom and Lineage has compatibility issues with the framework advanced tuning feature where it crashes the app and pretty much makes all of the settings in your screenshot inaccessible.
If you're on Lineage and you can't edit or simply add APNs, there's a bigger problem than just carrier operability. You should be able to at least create a new APN, editing of the existing default one is normally restricted but that's about it.
Maybe try doing a clean flash. An assuredly clean flash, like maybe flash LG stock image with clean partitions and device files, reinstall recovery and install LOS 15.1, magisk, gapps. Don't tinker with any modem or system files in between. If that works, great. If not, you'd at least have a clean system to work with modifying the apn config file and no run around chasing after a problem with fixes left and right with no luck fixing the actual problem.
some settings but not mtu preferred apn speeds net up and h2g2 project fi apn 3x speed
Related
**UPDATE**
This method causes your serial number to change to 00000000 (which isn't a problem as such as this isn't currently used for anything) but there is a new method which involves directly hex editing the nv_data.bin file, which may be faster and does not change your serial number. You can find the details here: http://forum.xda-developers.com/showthread.php?t=843323.
**UPDATE**
First up I'll say that I'm not incredibly familiar with Galaxy S firmware changes/modding, and this mostly builds on work done in these areas, so not all these steps may be necessary but they worked for me. If someone can suggest a faster way to do this/unnecessary steps then please go ahead and reply with them!
This unlocked my Network Locked Australian Galaxy Tab and so I assume should work for others.
You should back up your /efs/ folder before you proceed as you may need this to undo if something goes wrong.
*I take no responsibility if something goes wrong!*
Requirements:
Root access
repair_nv_data.zip (from http://forum.xda-developers.com/showpost.php?p=8942669&postcount=94)
Java
Busybox
The Android SDK for ADB, Root Explorer or some similar file system explorer/editor
(If you have US firmware with no Phone software, you may need to flash European firmware as described here: http://forum.xda-developers.com/showthread.php?t=838250 ).
Firstly, on your phone dial *#7465625# and check if the Network Lock is set to [ON], if so then your phone is locked (duh), so continue.
1. Use Superoneclick (http://forum.xda-developers.com/showthread.php?t=812367) to root your phone (the other z4root method may work as well, but this isn't what I used).
2. Either use ADB or some other method to rename or delete (backup first):
/efs/nv_data.bin.md5
/efs/.nv_data.bak
/efs/.nv_data.bak.md5
(I just used Root Explorer to rename them to something else).
3. Restart your phone and then go into the /efs/ directory and see if the 'nv_data.bin.md5' file has been re-created by your phone, as long as it has been created then you can proceed.
4. Go to http://forum.xda-developers.com/showpost.php?p=8942669&postcount=94 and download the repair_nv_data.zip file (the credit for all of this mostly goes to that thread and helroz).
5. Install 'busybox' from the Market. Once you install it, you actually have to run it and properly install it (the Market app is basically an installer) - the files in the above zip have a dependency on this.
6. Extract the above zip to your PC, plug in your Tab in USB debugging mode. Run the Step 2.bat from the extracted file. You may need to allow the script super user access several times. This should copy the /efs/ and a bunch of files into a directory with a french name.
7. Run the Reparation_nv_data.jar file. (You will need Java for this step.) It will prompt you to enter two numbers, which are your pseudo-unlock codes. I entered '11111111' and '11111111' (eight 1's) both times. This rewrites the nv_data.bin file to be simunlocked with these details.
8. Run the Step 4.bat. Your superuser app (the one installed when you rooted using SuperOneClick) will need you to allow each command to have root access so keep an eye on your Tab. You may need to press y/n a few times if you encounter errors. This is uploading the edited nv_data.bin onto your Tab.
This batch file will stop several times and need you to hit a key when it pauses. My Tab rebooted halfway through this batch file - when it did this I waited for it to fully reboot back to the lock screen before pressing a key to make the script continued while the Tab was actually able to respond to its commands.
9. Towards the end of its execution it rebooted a second time. It paused during loading up and had some yellow writing on the screen saying it was updating media (I assume it was rebuilding the nv_data.bin). Leave it for a minute and it will prompt you to reboot/some other options. Just press whatever it wants (home I think) to reboot the phone - you don't want any of the other recovery options.
10. Go into your dialer and put in *#7465625# again and (hopefully) voila! Your phone should no longer be network locked. Try a SIM from a different provider to make sure.
Enjoy!
Edit: I had to go out and actually buy a prepaid SIM to confirm that all was working with a different provider. Attached are screen caps of my Tab on two different networks, as well as the network status screen, making/receiving calls etc. all works on both.
Awesome man, thanks.
This is much better than the 2 month wait we had for Galaxy S unlocking.
Hello, I'm french and i use your post to unlock my Galaxy TAB SFR ''réunion island'' and she is unlock thanks for your AMAZING post for unlock TAB
Ps: For unlock my TAB by SFR REUNION, he tell me 150 Euros.... Vive smithdc & helroz
Works well! I had little trouble running java on windows7. But changing compatibility mode to windowsxp sp3 and check run this program as an administrator solved the problem.
Thanks for easy guide!
tacoda, you mean for running the .jar file? or for installing Java itself? (I assume the former).
Sweeet thx , curious if unlocking the AT&T version has hardware only set to AT&Ts 3G frequencies, so 3g wont work on tmobile or is it capable of running 3g on tmobile with a unlocked AT&T tab?
smithdc said:
tacoda, you mean for running the .jar file? or for installing Java itself? (I assume the former).
Click to expand...
Click to collapse
Running the jar file. I didnt know how to run it.
Sent from my SGH-T959 using XDA App
Does the sim card and/or sd card should or should not be plugged in during the unlocking progress?
It shouldn't make a difference Zeron.Wong.
jay_jay_n said:
Sweeet thx , curious if unlocking the AT&T version has hardware only set to AT&Ts 3G frequencies, so 3g wont work on tmobile or is it capable of running 3g on tmobile with a unlocked AT&T tab?
Click to expand...
Click to collapse
Traditionally, AT&T and T-Mobile hardware used different radios, it was more than just firmware. That's also true on the little brother Galaxy S series, the Vibrant has a different radio than the Captivate (though the Vibrant radio DOES have 1900 band in the hardware, for some reason).
Kudos to smithdc for this awesome guide! I saved a lot of money thanks to him. Congrats again.
Bump, is there any way to sticky/pin this for people?
So your saying if I use this method and install my tmous unlimited sim I can get calls and 3g or do I need a prepaid sim
I'm not sure on how T-Mobile are blocking, but if it IS my IMEI then you would have to use a SIM from a different network.
If they are blocking your IMEI on their network, then you would have to use a SIM from a different network (as a different network, wouldn't be blocking this IMEI number). Changing it to a different SIM on the same network won't help as your IMEI is for the device itself.
I just want to clarify something..
I have a T Mobile Tab and want to use a SIM I have for ATT.
Will I have to flash my device with the EU firmware first in order to get the phone software on it..then do the rest of the unlocking steps?
Assuming thats correct..after unlocking it I then can put my ATT sim card in and it should work for calls and data (Edge only) with not having to tweak any setting at all? Or do I have to set up my wap.cingular connections for the data like on a WM phone on ATT?
And if I want to get back to original out-of-the-box firmware from T Mobile (like if I had to send it in for repair) I just have to flash stock T Mobile firmware and its back completely to original?
Thanks..and wow am I loving this TAB !!!
You'll need to set up your APN data for AT&T, yes.
Thanks for the fast reply. As for the flashing of the EU rom..is that the only/best way so far in order for me T Mobile Tab to get the radio software on it. I was thinking I saw an APK for the radio software someplace but did not know what way was better.
I just want to be 100% sure bfr I take the jump to unlocking and playing with the phone part
thanks
I got a quick couple of questions:
1. If I restore original firmware (Canadian), does it relock my phone?
2. Where can I get the Canadian firmware release? I see EURO and US, but no Canadian.
I read on one of the other threads that sim unlock method also changes your imei number. Is this really case?
clubtech said:
I read on one of the other threads that sim unlock method also changes your imei number. Is this really case?
Click to expand...
Click to collapse
Yes, it will set your IMEI to a bogus one that will get your T-Mobile internet access disabled after 1/2 hour.
MOD EDIT: Offer of cash to perform these tasks has been removed and is not what XDA is about. This is a development site. This thread is being moved to Q&A where you can ask help how to continue the process on your own. Bounties may be offered for significant development for the community such as unlocking bootloaders, not for personal services
I'm technically inclined enough to flash my own roms, root my phone, flash radios etc etc. I'm just a little shy of being able to flash my phone from sprint to Page Plus.
I could go to a store and have it flashed, but I mess around with my phone too much to be going back every so often and paying them $40 a pop to do something that I am technically capable of doing.
I believe, what I need is a little guide on where to put what numbers when it comes to using QPST or DFS. I'm guessing since DFS is proprietary software I just dont have the correct license to have it recognize my Sprint S4. I have got QPST to recognize my phone by setting the correct com. I assume since it appears to be reading my phone all i need to do is put the numbers in the correct spots, possibly change some settings.
Phone is Rooted, twrp recovery installed, I already have my MSL, already have QPST talking to my phone by setting the correct com port. Due note, this phone has never been active on any carrier.
It would be nice if the guide would include:
1) What needs to be installed/flashed first. IE which roms/radios/firmwares/prls.
2) How to get into Diag.
3) How to get your MSL.
4) Which software (and version) is needed to input the correct codes/numbers to flash from Sprint to Page Plus
5) Exactly where and what numbers need to be into DFS or QPST.
6) Anything else I need to get the S4 over to Page Plus
7) 3g MUST work!
However, I have already accomplished 1-4. I'm assuming (a bad idea I know) I can get any codes/number I need from this thread.
http://forum.xda-developers.com/showthread.php?t=2270191
Anyone help? .
You know what they say: give a man a fish he'll eat for a day, but teach a man to fish he'll eat for life.
I already have part of a guide.
I just need help with the last bit.
This guide is from [email protected]
Sprint S4 Diag instructions:
1.dial *#7284#
2. click qualcomm usb settings and choose DM+ADB+MODEM
3. then turn on usb debugging in the development settings
4. plug in
This part did not work for me as I was running CM. But once I flashed to stock it was easier.
The rest will assume your familiar with flashing and know what to do
16 digit passwords are the same as the s3 versions
uscc-2010031619780721
verizon-2009031920090615
sprint-01F2030F5F678FF9 or 2012112120131219
To set the verizon and uscc to nv only you will need to send both the 16 digit password and the spc
Verizon and USCC just read from the donor for your info and write to the phone make sure you set pref mode to cdma_hdr
sprint write data settings as normal sprint phone in profile 0 and 1 active will be 0 and place the 10.key in efs2 using dfs
uscc doesn't need any sim but will display the invalid sim error
sprint no errors
verizon some need a used sim some doesn't need any sim try without first
if you dont have a donor then just put the mdn and min and sid in the nam tab on dfs with a prl
and data tab user id will be [email protected] and pw will be vzw same for mobile ip tab
but don't half flash give your customers 3g if not i eventually get the business
Want to learn 3g look for my 3g flashing guide online Its free to download
Enjoy.
no one will help because it is about making money on knowledge they gained from these forums for free!!!!
Searching the forums i've found scattered reports of similar issues but only one possible solution. The fix seemed to work for a few minutes but now can no longer get to work.
Unlocked bootloader and installed vincom's superlite 6.0.1 rom from https://forum.xda-developers.com/ga...-superlite-mini-mm-v1-0-361mb-g900w8-t3497158. Also flashed the 6.0.1 QL1_MODEM_NON-HLOS and QL1_MODEM from https://forum.xda-developers.com/verizon-galaxy-s5/development/modem-modems-t3154630. Everything seems to work except mobile data. Phone calls can be placed and received with no problem. Text messages can be received but not sent.
Viewed the Access Point Names (cannot be accessed through the normal settings menu but accessible using the Change Apn app) and can see a variety of Verizon APNs with possibly outdated information (MCC 311 MNC 480)? Attempted to create a new APN using instructions at https://forum.xda-developers.com/showpost.php?p=61262681&postcount=3 and info at https://bestmvno.com/apn-settings/verizon-wireless-apn-settings/ While the APN disappeared, as do any of the other options when the MCC and MNC is changed, the new settings still show up in /data/data/com.android.settings/shared_prefs/com.android.settings_preferences.xml (as mentioned in https://android.stackexchange.com/qu...ved-in-android)
The first time I created the new APN the LTE icon showed up and i was able to view websites using mobile data and receive text messages. 10 minutes later tried to send a text message and it failed, then noticed that no mobile data was working again. Have tried repeating the previous steps, but still no luck.
Any help is greatly appreciated
0graham0 said:
Searching the forums i've found scattered reports of similar issues but only one possible solution. The fix seemed to work for a few minutes but now can no longer get to work...
Click to expand...
Click to collapse
There's a few things to try to get the APN populated because the APN's are, typically, updated via the Verizon Network.
1) Sometimes if you Toggle the "Preferred network type to/from Global to LTE and restart the device, this sometimes will help with the APN's to get refreshed/updated.
2) I've got Net10 on my G900V and I have had to perform a Chat Session with the Net10 Support people (because I've had better luck with chat versus calling. That's your choice) and asked them if they can perform a Network Refresh for my device on the Verizon Towers. They may ask me to check one or two things that I usually respond with it looks good to get them to do the Network Refresh.
I hope one of these works for you and that I had explained this okay via text.
Good Luck!
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.
Ibuprophen said:
There's a few things to try to get the APN populated because the APN's are, typically, updated via the Verizon Network.
1) Sometimes if you Toggle the "Preferred network type to/from Global to LTE and restart the device, this sometimes will help with the APN's to get refreshed/updated.
Click to expand...
Click to collapse
Thanks, they've also hidden the network mode settings menu on this version, i'm currently looking up how to change the setting.
0graham0 said:
Thanks, they've also hidden the network mode settings menu on this version, i'm currently looking up how to change the setting.
Click to expand...
Click to collapse
The ability to access that specific setting is dependent upon the Firmware ROM installed. The Firmware would have to be developed with this feature.
This should be asked within the "Vincom's Superlite ROM" Thread.
Maybe they have this specific setting located elsewhere on your device...
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.
Thanks, as far as I understand it's a debloated version of the official Verizon 6.0.1 rom, i believe the same settings are hidden on the official version of the rom too. thanks again
0graham0 said:
Thanks, as far as I understand it's a debloated version of the official Verizon 6.0.1 rom, i believe the same settings are hidden on the official version of the rom too. thanks again
Click to expand...
Click to collapse
I'm not 100% sure regarding the Stock Firmware because I haven't had it on my G900V in quite a long time.
I've got 2 of them and 1 Has CyanogenMod and the other has LineageOS.
If memory serves me correctly (with a lost mind... LOL!) I believe that you may be able to access these options using one of the specific Dialer Codes but, I can't remember what any of them are.
As I had stated before, your best bet is to obtain some member guidance within the Firmware thread your using.
I wish you the best of luck!
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.
0graham0 said:
Searching the forums i've found scattered reports of similar issues but only one possible solution. The fix seemed to work for a few minutes but now can no longer get to work.
Unlocked bootloader and installed vincom's superlite 6.0.1 rom from https://forum.xda-developers.com/ga...-superlite-mini-mm-v1-0-361mb-g900w8-t3497158. Also flashed the 6.0.1 QL1_MODEM_NON-HLOS and QL1_MODEM from https://forum.xda-developers.com/verizon-galaxy-s5/development/modem-modems-t3154630. Everything seems to work except mobile data. Phone calls can be placed and received with no problem. Text messages can be received but not sent.
Viewed the Access Point Names (cannot be accessed through the normal settings menu but accessible using the Change Apn app) and can see a variety of Verizon APNs with possibly outdated information (MCC 311 MNC 480)? Attempted to create a new APN using instructions at https://forum.xda-developers.com/showpost.php?p=61262681&postcount=3 and info at https://bestmvno.com/apn-settings/verizon-wireless-apn-settings/ While the APN disappeared, as do any of the other options when the MCC and MNC is changed, the new settings still show up in /data/data/com.android.settings/shared_prefs/com.android.settings_preferences.xml (as mentioned in https://android.stackexchange.com/qu...ved-in-android)
The first time I created the new APN the LTE icon showed up and i was able to view websites using mobile data and receive text messages. 10 minutes later tried to send a text message and it failed, then noticed that no mobile data was working again. Have tried repeating the previous steps, but still no luck.
Any help is greatly appreciated
Click to expand...
Click to collapse
Another thing to try is find the boot image from the original rom and flash that. I do believe that requires a custom recovery like twrp. Is their a specific reason youre not using something like LineageOS or Candy Rom? They both have Android Oreo 8.1 versions available.
Hi,
Is anyone else having a problem with Xfinity Mobile data? I can make phone calls, but I can't get any data connection. This was a phone I bought from Sprint, and due to their messed up unlock system, it got relocked, so I manually unlocked it by using this method: https://forum.xda-developers.com/showpost.php?p=75994498&postcount=360
After that, the phone got unlocked successfully. It accepted a TMO sim, and I was able to update to newer firmware. Today, I decided to put it on my Xfinity Mobile line, and I just can't make data work. Any help would be appreciated.
Thank you,
OK. I think I narrowed down the problem. APN setting has VZWINTERNET. It's supposed to be COMCAST.RSLR.VZWENTP based on what I read on the internet. The problem is, I can't edit or add a new APN. I saw someone else talking about this APN setting problem, and his was resolved with the April security patch https://forums.androidcentral.com/e...cant-add-edit-apn-all-sudden-lost-4g-lte.html
I have that security patch already installed, but my problem persists. I can't change APN. Any help would be appreciated.
It's possible Xfinity locks the APN settings or that it has something to do with yours being the Sprint version. I would power the phone down and remove the SIM. Power the phone on with no SIM card and when you are booted up go into settings and reset the network settings. Power down again and insert your Xfinity SIM. That should ensure that the new SIM populates all the network settings.
jhs39 said:
It's possible Xfinity locks the APN settings or that it has something to do with yours being the Sprint version. I would power the phone down and remove the SIM. Power the phone on with no SIM card and when you are booted up go into settings and reset the network settings. Power down again and insert your Xfinity SIM. That should ensure that the new SIM populates all the network settings.
Click to expand...
Click to collapse
Thank you for replying. That did not work. I don't think it's Xfinity. The problem is that APN gets locked to VZW instead of Xfinity's APN, which is why data doesn't work. I can put a TMO sim card in it and it works fine, so I don't know that there is something wrong with the phone itself. If you have any other suggestions, I would appreciate it. I'm desperate to get this working.
goldentequila said:
Thank you for replying. That did not work. I don't think it's Xfinity. The problem is that APN gets locked to VZW instead of Xfinity's APN, which is why data doesn't work. I can put a TMO sim card in it and it works fine, so I don't know that there is something wrong with the phone itself. If you have any other suggestions, I would appreciate it. I'm desperate to get this working.
Click to expand...
Click to collapse
In a Reddit thread, a user says you need to disable Enhanced LTE:
Under Settings > More > Cellular Networks, disable "Enhanced 4G LTE Mode" and set "System select" to "Automatic"
Haven't tried it myself, but I'm thinking of switching to XM and would like to know how this works out for you.
Get your original Xfinity phone factory reset the original Xfinity phone put your Sim in go through activation. This should work for you this also fixes volte on Xfinity If your volte ever gets deactivated. Anyway from what has happened to my other phones sometimes the apn can get changed on the Sim and got carried over somehow. Resetting the original Xfinity phone will bring the Sim settings back to the Sim card thus fixing your apn settings.
(Another way is to use another phone to edit the apn settings)
I also have Xfinity mobile and it's working fine. Just sometimes my apn gets uncheck and I don't know why
If you messed with bands.
Also make sure you go and download hidden settings from the playstore if you messed with your bands and selected American bands you need to select automatic bands if you messed with radio information page settings.
I messed with bands and it caused phone calls to not work.
---------- Post added at 10:08 AM ---------- Previous post was at 09:31 AM ----------
The Sim saves apn settings and I did notice the first time using this essential phone I had 2 options in the apn and I read carefully which one to select. It may have saved the incorrect information to the Sim. I did this once on a Moto phone and I thought if I put Verizon apns instead of Comcasts I could get better speeds. But I caused my data to stop working. I reset the Moto phone and u still had the problems. I looked for the apn for Comcast couldn't find it. Then I thought of either editing the apn using another phone or using the original Xfinity phone. But it does get saved for sure. I ran into this issue before and I'm pretty sure this will resolve the problems.
goldentequila said:
Thank you for replying. That did not work. I don't think it's Xfinity. The problem is that APN gets locked to VZW instead of Xfinity's APN, which is why data doesn't work. I can put a TMO sim card in it and it works fine, so I don't know that there is something wrong with the phone itself. If you have any other suggestions, I would appreciate it. I'm desperate to get this working.
Click to expand...
Click to collapse
Ever get this resolved?
rootnooby said:
Ever get this resolved?
Click to expand...
Click to collapse
Yes. I manually sideloaded Beta Oreo build, even though my phone already had the official OTA Oreo on it. That fixed the connection issue altogether.
goldentequila said:
Yes. I manually sideloaded Beta Oreo build, even though my phone already had the official OTA Oreo on it. That fixed the connection issue altogether.
Click to expand...
Click to collapse
Wow. Glad to hear your issue is resolved. Who would ever think of going back to a beta build from an official build to fix a connection issue! I may try Xfinity mobile in the near future. Thank you.
rootnooby said:
Wow. Glad to hear your issue is resolved. Who would ever think of going back to a beta build from an official build to fix a connection issue! I may try Xfinity mobile in the near future. Thank you.
Click to expand...
Click to collapse
Yea, it was just a desperate move lol. Glad it'll be helpful for others.
I had the worst time making the XFinity mobile work on Android Pie with the October patches in place and finally got it working. Basically, there was no way to edit the APN configuration even with root on the device via actual Android. What I did to fix this was the following...
-Followed the rooting procedure to get TWRP and Fastboot installed
-I then used "Termux" to copy the APN points configuration file to a writable location. In my case I copied the file from "\system\etc\apns-conf.xml" to a "\sdcard\Download". Keep a copy of the original file.
-I then simply copied the file over to my computer and opened it in NotePad++. I did a search for the following string in single quotes: 'carrier="Verizon"\n mcc="311" '
-This should pull up 5 results in the search and you should confirm that each of the lines has the mnc value set to 480, 'mnc="480"'. On each of the sections that came up, I switched the following variables as shown below...
apn="COMCAST.RSLR.VZWENTP"
authtype="0"
protocol="IP"
roaming_protocol="IP"
-Once you have edited the file, copy it to a writable location on the device, like "/sdcard/Download".
-This then requires rebooting into recovery mode with TWRP and you will need to make sure you have encryption and a PIN disabled on your device to make sure you have full access to the device file system.
-Within the main TWRP page, select "Mount" and you will need to have the "System" and "Data" partitions selected.
-Return to the main page and select "Advanced" and then "File Manager".
-Next, locate the original apns-conf.xml that you copied earlier. It should show up as being in "/system/system/apns-conf.xml". Click on that file, and select "chmod 755".
-Next, navigate to where you have the edited apn file located. Copy that file over to replace the apns configuration file at "/system/system/apns-conf.xml". Just make sure you have a backup of that original file before replacing it.
-Finally, reboot your phone into the OS and you should magically have Xfinity mobile working.
This took a lot longer than I wanted to spend getting it working, but I believe this is because of the carrier ID and MCC being shared with Verizon instead of a separate one for XFinity mobile which forces it to default to the first Verizon APN setting which doesn't allow this to work. There are other ways to edit the APN configuration file, however I found it was quickest to do the actual file replacement with TWRP since that gives you full file system root access.
bschaff1 said:
I had the worst time making the XFinity mobile work on Android Pie with the October patches in place and finally got it working. Basically, there was no way to edit the APN configuration even with root on the device via actual Android. What I did to fix this was the following...
-Followed the rooting procedure to get TWRP and Fastboot installed
-I then used "Termux" to copy the APN points configuration file to a writable location. In my case I copied the file from "\system\etc\apns-conf.xml" to a "\sdcard\Download". Keep a copy of the original file.
-I then simply copied the file over to my computer and opened it in NotePad++. I did a search for the following string in single quotes: 'carrier="Verizon"\n mcc="311" '
-This should pull up 5 results in the search and you should confirm that each of the lines has the mnc value set to 480, 'mnc="480"'. On each of the sections that came up, I switched the following variables as shown below...
apn="COMCAST.RSLR.VZWENTP"
authtype="0"
protocol="IP"
roaming_protocol="IP"
-Once you have edited the file, copy it to a writable location on the device, like "/sdcard/Download".
-This then requires rebooting into recovery mode with TWRP and you will need to make sure you have encryption and a PIN disabled on your device to make sure you have full access to the device file system.
-Within the main TWRP page, select "Mount" and you will need to have the "System" and "Data" partitions selected.
-Return to the main page and select "Advanced" and then "File Manager".
-Next, locate the original apns-conf.xml that you copied earlier. It should show up as being in "/system/system/apns-conf.xml". Click on that file, and select "chmod 755".
-Next, navigate to where you have the edited apn file located. Copy that file over to replace the apns configuration file at "/system/system/apns-conf.xml". Just make sure you have a backup of that original file before replacing it.
-Finally, reboot your phone into the OS and you should magically have Xfinity mobile working.
This took a lot longer than I wanted to spend getting it working, but I believe this is because of the carrier ID and MCC being shared with Verizon instead of a separate one for XFinity mobile which forces it to default to the first Verizon APN setting which doesn't allow this to work. There are other ways to edit the APN configuration file, however I found it was quickest to do the actual file replacement with TWRP since that gives you full file system root access.
Click to expand...
Click to collapse
You couldn't cut and paste the file back with a root file manager? Maybe a magisk module? And does this lock you to Verizon?
Sent from my PH-1 using XDA Labs
avd said:
You couldn't cut and paste the file back with a root file manager? Maybe a magisk module? And does this lock you to Verizon?
Sent from my PH-1 using XDA Labs
Click to expand...
Click to collapse
I'm sure there are other ways to get the file back there, but I found my approach to be a quick bypass for other methods of getting root.
Regarding Verizon, It would probably break a Verizon connection for a sim carrier code of 311480. However, since this post is about Xfinity mobile, this is the quick way I got it working. In the future I want to change the priority on the APN configurations which may allow Xfinity mobile and Verizon to play nicely. The issues that have caused this are Android Pie restricting people from changing settings on the phones they own and Xfinity mobile being either too lazy or cheap to commit to their own carrier code and provide that information to manufacturers.
bschaff1 said:
I'm sure there are other ways to get the file back there, but I found my approach to be a quick bypass for other methods of getting root.
Regarding Verizon, It would probably break a Verizon connection for a sim carrier code of 311480.
Click to expand...
Click to collapse
Breaking a Verizon contract for sim carrier code would be a drastic move, considering.. The only money you have to spend is $5 on a Verizon prepaid phone card. Go into a Verizon corporate store and they will give you a sim, ( it's $20 if you don't go to the corporate store)
Sent from my mata using XDA Labs
done: V20 unlock & root via dirtysanta
Everything else works, Wifi, calling, SMS, etc. - all good.
SIMs connect fine, with two different carriers.
But no mobile data. What to do?
TOC:
#2 diagnosis
#3 history: what I have tried
#4 links: possibly useful posts & threads
#5 what would have been wise: DO ALL POSSIBLE BACKUPS before you begin !!!
Suggestions please what else I can try.
diagnosis
some infos about the device:
h910
original state before I began: H91010I, Android security patch level: December 1, 2016
the h910 frequencies are definitely fine for carrier one or carrier two
Currently:
Device model: LG-h910
Android version: 7.1.2
LineageOS version: 14.1-20181128-NIGHTLY-h910
Android security patch level: 5 November 2018
Baseband version: MPSS.TH.2.0.1.c3 .... long ... [Sept 01 2016 13:00:00]
kernel version: 3.18.31-perf-g6662....
Build date Wed Nov 28 .... 2018
Build number lineage_h910-userdebug 7.1.2 NJH4 ...
Earlier (see below) I could get the *#546368#*915# menu (which should now have become *#546368#*910# right?), but now nothing happens anymore. Is that overwritten by LineageOS?
What I get now is *#*#4636#*#* with this info:
IMEI: Same as on sticker under battery
Phone number: correct
Current network: Telekom.de
Signal strength: -103 dBm 5 asu
Voice service: In service
Data service: Connecting
Voice network type: UMTS
Data network type: UMTS
Voice call status: Idle
Roaming: Not roaming
Set preferred network type: LTE/UMTS auto (PRL)
Run Ping test: Hostname IPv4: Fail(2)
Run Ping test: Hostname IPv6: Fail(2)
Run Ping test: HTTP Client Test: Fail: IOException
What else can I read out, to help you diagnose it?
Thanks!
what I have tried
some of the things that I have tried so far:
dirtysanta via JustRunMe.cmd script (finally worked when I had found out all these 5 hints)
LineageOS-14.1, quite some app install and configuration work, and then a TWRP backup.
... only days later (because ill always at home) suddenly realized: Oops, I have no mobile data!
bricked when trying to flash some stock ROM
(unpatched) LGUP refused any KDZ but this one "h910PR" (PuertoRico? Claro branded), so I flashed that. But then not even a carrier signal. And not dirtysanta rootable.
Patched LGUP - hint: specific path
Patched LGUP: Complete dump (of that dysfunctional state, but perhaps some of my original partitions are still in there?)
Patched LGUP: flash h915 KDZ "H91510e_00_VTR_CA_OP_1205.kdz"
dirtysanta, same as above, but with newer TWRP
TWRP --> h910 firmware "h910-10r.zip", see this thread. Resulted in faulty state, frequent app crashes; EULA crashing, so I could not even get to USB debugging settings. Gave up. Instead:
TWRP --> restored my previous LineageOS from above.
Whew, happy to have most functionality back after that horrible odyssee - but still no mobile data. Any ideas what else I can try?
useful pages
possibly useful threads and posts that I found while searching for solutions and trying all kind of things
complicated instructions to "fix signal and data (h910 only)" - not tried yet.
ARB *#LGMENU#*910#
patchedLGUP --> h915 --> TWRP --> h910? Tried that, but then lots of apps crashing, incl. EULA crashing, i.e. could never get back to USB-debugging; decided to restore back my initial LOS backup instead
h910 return to stock
perhaps flash modem and operatorlogging - but where to get them from, as I have no own dump from before.
*#*#4636#*#* = hidden menu under LOS
...
... = more to be added, unready
"after a battle, everyone is a general"
It would have been clever to do these two things initially, before I even started:
complete dump with "patched LGUP" (see hint above about the only allowed PATH for unpacking)
then I would have a copy of my whole phone now - but that ship has sailed.
(Anyone who can help me, providing me with some of the original partitions, please contact me, thanks!)
Then, as soon as I was in TWRP it would have been clever to do
a complete TWRP backup
I dimly remember to have actually tried that, and a lot of the partitions did not work to be backuped within TWRP, not EFS or anything else? (possibly because the dirtysanta JustRunMe.cmd method had flashed a 996-TWRP onto my h910 ? Or for whatever reason, ...) I could not backup them, so my earliest TWRP backup (more than two weeks ago *sigh*) sadly only contains ONE partition "system" which is the original system plus dirtysanta.
I do have a later EFS + firmware partition TWRP backup. Later = after LineageOS installed already. Without that backup, I would not have gotten the carrier signal back. But it stll does not seem enough to give me mobile data ... ? What am I missing?
What might help you to understand why I did neither backups: I would have never in my wildest dreams imagined that, more than 2 weeks later, I would still be struggling with this one limited task, to simply unlock & reinstall a phone. Sorry, I completely underestimated the complexity of this whole endeavour. My hint to you: Treat it like an open brain surgery on your only child. Yes, BEFORE YOU START, you want any backup imagineable, even if it takes you days to find out how exactly to execute that backup. This is not easy klte Samsung s5; this LG stuff here is a whole different ballgame. TAKE IT MORE SERIOUS. Do backups first!
May your phone not get wasted. And may my own phone perhaps still get saved somehow ... Thanks for any idea you have for that!
----
Edit:
oh wow, this looks SUPEREASY "partitions backup & restore" https://play.google.com/store/apps/details?id=ma.wanam.partitions = BACKUP EVERYTHING, SIMPLY FROM AN APP. Only works after rooting, but that should be the first thing you do then !!!!!!
In short: All working, but no mobile internet. Any ideas much welcome.
Have you checked your apns?
Thanks.
me2151 said:
Have you checked your apns?
Click to expand...
Click to collapse
Yes.
But checked again now:
APN "reset to default". There were 6 different apn settings. I let the phone decide.
then I chose the one that their homepage explained to be the right one.
then I put the SIM into some stock ROM phone (where I got mobile data just fine with that SIM), wrote down all APN settings, swapped back the SIM into the v20, and entered a manual APN with those exact settings.
In all cases - No mobile data.
What can I try next?
anyone new ideas?
ankade said:
done: V20 unlock & root via dirtysanta
Everything else works, Wifi, calling, SMS, etc. - all good.
SIMs connect fine, with two different carriers.
But no mobile data. What to do?
TOC:
#2 diagnosis
#3 history: what I have tried
#4 links: possibly useful posts & threads
#5 what would have been wise: DO ALL POSSIBLE BACKUPS before you begin !!!
Suggestions please what else I can try.
Click to expand...
Click to collapse
What about manually inputting your telcos apn details o see if that will switch it on. I know my telco here in aus has about 4 different apn's
ksiecasey said:
What about manually inputting your telcos apn details o see if that will switch it on. I know my telco here in aus has about 4 different apn's
Click to expand...
Click to collapse
Yes, I have tried that. No mobile data.
Any other ideas?
ankade said:
Thanks.
Yes.
But checked again now:
APN "reset to default". There were 6 different apn settings. I let the phone decide.
then I chose the one that their homepage explained to be the right one.
then I put the SIM into some stock ROM phone (where I got mobile data just fine with that SIM), wrote down all APN settings, swapped back the SIM into the v20, and entered a manual APN with those exact settings.
In all cases - No mobile data.
What can I try next?
Click to expand...
Click to collapse
Hmmm could be that your Arial plugs might be misaligned or not connecting properly though that's a long shot. I've bought a few of these lgv20s and one had a faulty Arial which I fixed through removing the bottom wedge slot of the phone and patching it up. Telco antenna is the bottom right gold plugs if I remember correctly. I also take out the mesh in between the bottom speaker which increases the speakers volume somewhat... But I digress... When entering the apn manually there is usually a setting that says to leave empty e.g 'authentication' ~none~ which you have to actually select 'none' not just leave it blank. That's gotten the better of me many times now...
---------- Post added at 09:58 PM ---------- Previous post was at 09:43 PM ----------
ankade said:
Yes, I have tried that. No mobile data.
Any other ideas?
Click to expand...
Click to collapse
So your running at&t phone? I flashed the alpha Omega Oreo 8.0 rom and it works beautiful. I did the dirty santa root using patched lg up to flash 915kdz then as soon as twrp is on the phone I flash straight to alpha Omega rom. No return to stock options because I'm lazy . I've done it to 3 v20s now and though the first root was timely...boot loops ect... It was only because the phone is a finnicky one to root.
The link for alpha rom. Make sure you have an SD card that's formatted to the specified setting. Don't make the stupid mistake I did with my 256gb SD card which I left in the phone while flashing the room and kernal........ Lucky there's a program called 'recuva ' which saved most of my filesystems but now the card is a jumbled mess of **** everywhere lol. Live and learn...
https://forum.xda-developers.com/v20/development/alpha-omega-rom-oreo-vs995-h910-ls997-t3847510
---------- Post added at 10:21 PM ---------- Previous post was at 09:58 PM ----------
It also might be that your at&t apps 'permissions settings ' may need to be resset or maybe updated? I'm still slowly figuring out which system and AT&T apps ect I can safely remove which won't affect the phones various call function s for use in AUS. I had an interesting failure using debloater software which resulted in me apparently uninstalling something I shouldn't have which caused the second screen to stop working and thus a phone resset.
---------- Post added at 10:53 PM ---------- Previous post was at 10:21 PM ----------
ksiecasey said:
What about manually inputting your telcos apn details o see if that will switch it on. I know my telco here in aus has about 4 different apn's
Click to expand...
Click to collapse
Oh I almost forgot!!! Make sure you turn on developer mode and USB debugging /oem unlock too!
Thanks a lot, ksiecasey. Answer 1:
ksiecasey said:
Hmmm could be that your Arial plugs might be misaligned or not connecting properly though that's a long shot. I've bought a few of these lgv20s and one had a faulty Arial which I fixed through removing the bottom wedge slot of the phone and patching it up. Telco antenna is the bottom right gold plugs if I remember correctly. I also take out the mesh in between the bottom speaker which increases the speakers volume somewhat... But I digress...
Click to expand...
Click to collapse
I have tried to find it now. Please have a look:
Is this the "bottom wedge slot" ?
https://i.imgur.com/6XvoF5H.jpg
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With ~8 screws removed, I could still only lift one side up, the one with the loudspeaker.
See this:
https://i.imgur.com/pKQTVf0.jpg
Where exactly is the Aerial you are talking about?
Also ... if the Aerial were the problem, then would not I have no cell reception at all? Sorry, but I don't understand phone tech well enough yet.
I do have cell signal, I can call out, receive calls, send and receive SMS, etc. - but no mobile data, regardless what I tried.
Thanks a lot, ksiecasey. Answer 2 / 2 :
ksiecasey said:
But I digress... When entering the apn manually there is usually a setting that says to leave empty e.g 'authentication' ~none~ which you have to actually select 'none' not just leave it blank. That's gotten the better of me many times now...
Click to expand...
Click to collapse
Good to know.
I have checked the APN settings again. Wrote it all down when that SIM in a 2nd phone, then input all information onto an APN setting on the sick V20.
The only such place is "Authentication type", and it has to be set not to "None" but to "PAP". (Or rather, I have just tried it out, it does not matter whether it is set to "None" or to "PAP" because both works, and it is set to "PAP").
All the other places either have a value set, or "not set", which is an empty entry.
How do APNs work in general?
I had always assumed I need only ONE of those APN settings (the one which is "enabled" via radiobutton). Is that correct? Or do I have to input all 9 APNs? I have just done ... Mobile Network settings ... Access point names ... three dots menu ... Reset to default. Now (on the stockrom-data-working-fine-phone) I see 9 APNs, seven of which have a radio button, and one of them is enabled. I only need that one APN settings, right?
ksiecasey said:
So your running at&t phone?
Click to expand...
Click to collapse
Yes but no. Yes, is h910 hardware, but no, I am running LineageOS. See #2 diagnosis. However, I got there on a rather convoluted way, see post "#3 History".
ksiecasey said:
I flashed the alpha Omega Oreo 8.0 rom and it works beautiful. I did the dirty santa root using patched lg up to flash 915kdz then as soon as twrp is on the phone I flash straight to alpha Omega rom. No return to stock options because I'm lazy . I've done it to 3 v20s now and though the first root was timely...boot loops ect... It was only because the phone is a finnicky one to root.
Click to expand...
Click to collapse
Yes.
I might try alpha Omega Oreo 8.0 rom when I find the time for it. But while I was on that odyssee described in post #3 , I always tried, and I did not have mobile data nowhere. But perhaps it is worth the try, to also flash AlphaOmega, and see if it's actually the v20-LineageOS which is f***ing up the mobile data. In between I had also tried the October LineageOS instead of the November LineageOS, but both give no mobile data on my device.
ksiecasey said:
Make sure you have an SD card that's formatted to the specified setting. Don't make the stupid mistake I did with my 256gb SD card which I left in the phone while flashing the room and kernal........
Click to expand...
Click to collapse
Please point me to that info, about the "SD card specified setting", I could not find it in that thread, sorry.
ksiecasey said:
It also might be that your at&t apps 'permissions settings ' may need to be resset or maybe updated? I'm still slowly figuring out which system and AT&T apps ect I can safely remove which won't affect the phones various call function s for use in AUS.
Click to expand...
Click to collapse
I am not running AT&T, but LineageOS.
Which "permission settings" could prevent getting mobile data?
Where in LineageOS (or more general in Android) do I "reset all permission settings" ?
Thanks a lot!
For future reference this is where the mobile reception antenna is located. I'm swaying more towards thinking it's the liniage rom which is the 'root' ?of your problems.. download the Omega rom which is the same as your actual original phone. As long as you have twrp on your phone you should be good.
ksiecasey said:
For future reference this is where the mobile reception antenna is located. I'm swaying more towards thinking it's the liniage rom which is the 'root' ?of your problems.. download the Omega rom which is the same as your actual original phone. As long as you have twrp on your phone you should be good.
Click to expand...
Click to collapse
the arial actually runs along the inside of the plastic cover and when i recieved this phone through ebay from hongkong (260$) bargain lol the contacts werent touching so i soldered a thin copper piece to the inside of the end cap and voila! also if your interested, the wifi arial is in line with the mobile arial but on the other end or at the top of the phone.
about the sd card..... i believe it says somthing as you start the actual rom flashing about that.
this pic sshows mobile data working on my phone
ksiecasey said:
the arial actually runs along the inside of the plastic cover and when i recieved this phone through ebay from hongkong (260$) bargain lol the contacts werent touching so i soldered a thin copper piece to the inside of the end cap and voila! also if your interested, the wifi arial is in line with the mobile arial but on the other end or at the top of the phone.
about the sd card..... i believe it says somthing as you start the actual rom flashing about that.
this pic sshows mobile data working on my phone
Click to expand...
Click to collapse
also to make patched lg up work properly it MUST be installed in the right place { see photo}
this caused me much grief in the past sigh*
i lost data and signal after every new rom instal. What i need to do was to flash modem, modemst1 and modemst2 through fastboot to get back signal and data, but it only works on stock nougat rom.On oreo rom i get back only signal but no data.Now i am using super rom https://www.super-rom.ga/# , where i have signal and data without need to flash dumps. Only thing i need to do is set apn.
Thank you two sooooo much, great infos. Sorry: Super busy with other things right now. But I will definitely try all this as soon as I can.
Looks like LineageOS for the V20 is faulty?
ksiecasey said:
I'm swaying more towards thinking it's the liniage rom which is the 'root' ?of your problems..
Click to expand...
Click to collapse
Peter911 said:
i lost data and signal after every new rom instal. What i need to do was to flash modem, modemst1 and modemst2 through fastboot to get back signal and data, but it only works on stock nougat rom.On oreo rom i get back only signal but no data....
Click to expand...
Click to collapse
I bought a V20 to use LineageOS, and "signal but no data" is not what I expected, but perhaps that is only me lol.
How can we get that information onto the official pages? So that people are warned before? e.g.
* the lineageos page https://wiki.lineageos.org/devices/h910/install
* perhaps here too? https://forum.xda-developers.com/v20/development/dev-cm14-t3509953
* where else?
Any ideas how to add information to that LOS page?
I have the exact same issue as you, I bought a brand new V20 and got it rooted with the very first guide by me2151 to then install LOS 18.1. Everything works but mobile data. Longer explanation in this post.
Did you manage to find a solution ? I'd rather get on some track from someone experienced and knowledgeable than to start reinstalling for likely nothing.