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Samsung Note 3 doesn't want to recognize/register my SIM

I'm not a 100% sure how this problem occurred, I believe it was after flashing an S5 custom rom called: "RC Elite S5 Port V16" To my Samsung Galaxy Note 3 (N900W8). From what I was reading it was a ROM that "converts" your note 3 to a note 4 or s5, while still having all the Note 3 features. Another possible cause is trying to use RegionLock Away.apk by Chainfire to essentially(unlock) the phone. I feel like this is the main cause though as this affects the modem on the phone. This isn't the SIM as I tried it in another phone and works fine with calls and texts.
My phone doesn't want to register its mobile network anymore. When I try to make a call or text it says:
"Not Registered on network"
I was reading online for about 2-3days now for possible solutions that can cure this. Such as:
1. Going into Mobile Networks settings and manually register [failed, details below]
2. Going into Mobile Networks settings, hold home button for 2seconds and then hold power button + home button for 15seconds [failed, details below]
3. Taking out battery while the phone is on and remove the SIM card, clean it and re-insert [failed]
4. Factory Reset [Failed]
5. Wipe Storage and re-flash stock ROM [Failed]
Options 1 & 2 do not work because when I try to access Mobile Network Settings I get this:
"Insert SIM card to access network services"
The SIM card is inside the phone though...
So what I did is found a mobile network options shortcut "program" from GooglePlay Store and installed it. It allows me to access the menu, which is great! Now, when I try to register the SIM card to my correct service provider (BELL CANADA)...it will make me wait for about 1-2minutes before I get "Unable to register, try later" error.
I tried the factory restore with a stock 4.4.2 ROM from Sammobile and the issue is still there.
Is there anything that anyone knows that can help me resolve this problem? I tried EVERYTHING i can possibly find on Google. I've seen posts of people suggesting to flash a modem.bin file with Odin but I don't know where to get those files, nor what to look for in terms of modem file "types".

Dial *#1234# in stock rom and tell me what appears.

Joku1981 said:
Dial *#1234# in stock rom and tell me what appears.
Click to expand...
Click to collapse
Hey there thanks for your swift reply and apologies for my late reply!
I'm on my way home from work now so i'll let you know when I get to what you told me to do. I'll edit/reply when I have the info.
Warm Regards,
MmoFanatic

Joku1981 said:
Dial *#1234# in stock rom and tell me what appears.
Click to expand...
Click to collapse
Version:
AP: N900W8VLUCNB7
CP: N900W8VLUCNB7
CSC: N900W8OYACNB7
I hope this means something. Let me know, thanks!

MmoFanatic said:
Version:
AP: N900W8VLUCNB7
CP: N900W8VLUCNB7
CSC: N900W8OYACNB7
I hope this means something. Let me know, thanks!
Click to expand...
Click to collapse
Install this APP and add me some screenshots pls (cover IMEI and serial number if they are real).

Joku1981 said:
Install this APP and add me some screenshots pls (cover IMEI and serial number if they are real).
Click to expand...
Click to collapse
Many thanks for your swift replies. I have it layed out in an album with thumbnails at the top. Hopefully it made it easier for you to look. I skipped past DEVICE ID as a whole as both IMEI and SERIAL #'s are 100% original and legitimate.
imgur.com/a/grUQt#0

MmoFanatic said:
Many thanks for your swift replies. I have it layed out in an album with thumbnails at the top. Hopefully it made it easier for you to look. I skipped past DEVICE ID as a whole as both IMEI and SERIAL #'s are 100% original and legitimate.
imgur.com/a/grUQt#0
Click to expand...
Click to collapse
Backup your internal data and factory reset your device (Settings > Accounts > Back Up and Reset > Factory Data Reset > Reset Device > Delete All/Erase Everything.)

Joku1981 said:
Is you device unlocked? Are u using Bell Mobile Company?
Click to expand...
Click to collapse
I tried region unlocking it with RegionLock Away by Chainfire. I would like to say afterwards this issue occurred but as far as im concerned, using a TELUS Mobility sim card activates the network pin unlock. So i'll be going with no, it's not unlocked.
I currently have a Bell LTE 4G SIM card installed on the phone. If you check the photos there it shows I have a full connection but unable to make calls nor access the mobile networks menu.... =/
I can provide pictures on the error messages if you'd like.
Warm Regards,
MmoFanatic.
Edit: I'm performing a factory reset right now. I'll let you know if this fixes it. Thanks.

MmoFanatic said:
I tried region unlocking it with RegionLock Away by Chainfire. I would like to say afterwards this issue occurred but as far as im concerned, using a TELUS Mobility sim card activates the network pin unlock. So i'll be going with no, it's not unlocked.
I currently have a Bell LTE 4G SIM card installed on the phone. If you check the photos there it shows I have a full connection but unable to make calls nor access the mobile networks menu.... =/
I can provide pictures on the error messages if you'd like.
Warm Regards,
MmoFanatic.
Click to expand...
Click to collapse
Yes, pls add more screenshots.

Joku1981 said:
Yes, pls add more screenshots.
Click to expand...
Click to collapse
Okay. Here are some more screenshots.
imgur.com/a/2HPR6 (can't insert links till 10posts+)
These errors are really getting the best of me. I can't use my phone anymore D:
And as mentioned in OP, I downloaded a shortcut from the GooglePlay store that allowed me to access the Mobile Networks options. When I try to register to bell i keep getting "Unable to connect, try later"
Thanks for your help.

MmoFanatic said:
Okay. Here are some more screenshots.
imgur.com/a/2HPR6 (can't insert links till 10posts+)
These errors are really getting the best of me. I can't use my phone anymore D:
And as mentioned in OP, I downloaded a shortcut from the GooglePlay store that allowed me to access the Mobile Networks options. When I try to register to bell i keep getting "Unable to connect, try later"
Thanks for your help.
Click to expand...
Click to collapse
Do one thing.
1. Turn off the phone. Take a out the simcard and battery for some min.
2. Add the battery only. Turn on the phone and factory reset your device (Settings > Accounts > Back Up and Reset > Factory Data Reset > Reset Device > Delete All/Erase Everything.)
3. Insert SIMCARD without turn off the phone.

Joku1981 said:
Do one thing.
1. Turn off the phone. Take a out the simcard and battery for some min.
2. Add the battery only. Turn on the phone and factory reset your device (Settings > Accounts > Back Up and Reset > Factory Data Reset > Reset Device > Delete All/Erase Everything.)
3. Insert SIMCARD without turn off the phone.
Click to expand...
Click to collapse
They there! I tried to follow all the steps to the best of my ability but it seemed that didn't work. For 1, the note 3's sim card slot is blocked by the battery so i can't take it out without turning it off. In addition, after only inserting the battery and performing the factory reset, I decided to test it and the issue is STILL there even though a sim card isn't even inserted AFTER the factory reset. Same error messages as if nothing ever happened, even shows full bar reception even though nothing is in there. =/
This is the most unique problem I have ever encountered myself. I really don't know what to say...

bump issue still here

MmoFanatic said:
bump issue still here
Click to expand...
Click to collapse
Bumping.
After some more research I was wondering if you reflash the stock firmware back, does it effect the EFS partition at all? Cause if it doesn't I believe I installed a faulty EFS partition accidentally which results in the broken connection.
Any way I can get a backup of an EFS file that I can flash?
Thanks.

Bump. This issue is driving me nuts.
Thank you in advance.

try to put ur sim in another phone or change the sim with a new one

dancapitan said:
try to put ur sim in another phone or change the sim with a new one
Click to expand...
Click to collapse
Thanks for the reply!
Sim works in other phones, new sim doesnt work.

Bump
Issue still there.
Thanks in advance for the replies.

I had this same problem earlier (for a note 2) in the week where it just wont register any sim card.
In my case i think the problem was that i did a full format before flashing which probably deleted the EFS folder.
I tried so many options and eventually managed to resolve it by following the following instructions to restore the stock firmware.
Edit: Unfortunately i cant post URLs as i dont have enough posts
You can get to the page if you search for the following text in Google (The first entry in the results page)
"EFS folder or IMEI on Android is corrupted site:alfredivy.per.sg"

2iggy said:
I had this same problem earlier (for a note 2) in the week where it just wont register any sim card.
In my case i think the problem was that i did a full format before flashing which probably deleted the EFS folder.
I tried so many options and eventually managed to resolve it by following the following instructions to restore the stock firmware.
Edit: Unfortunately i cant post URLs as i dont have enough posts
You can get to the page if you search for the following text in Google (The first entry in the results page)
"EFS folder or IMEI on Android is corrupted site:alfredivy.per.sg"
Click to expand...
Click to collapse
Hey there!
Thanks for your swift reply! I had already did the Samsung Recovery via Kies 3. Do you know if I reflash it that way that the EFS folder would get flashed as well? Because after doing those steps the issue is still there, after about 3 firmware recovery flashes. xD
I didn't even think about backing up the stupid EFS folder otherwise I would have. I was looking at this
http://www.alfredivy.per.sg/blogger/2014/03/efs-folder-imei-corrupted/
Is this the same one? xD
Thanks again.

N900W8 refuses to accept SIM/make calls

I have made a prior thread regarding this issue in troubleshooting/help but no-one is biting and I REALLY need this solved. PLEASE.
I'm not a 100% sure how this problem occurred, I believe it was after flashing an S5 custom rom called: "RC Elite S5 Port V16" To my Samsung Galaxy Note 3 (N900W8). From what I was reading it was a ROM that "converts" your note 3 to a note 4 or s5, while still having all the Note 3 features. Another possible cause is trying to use RegionLock Away.apk by Chainfire to essentially(unlock) the phone. I feel like this is the main cause though as this affects the modem on the phone. This isn't the SIM as I tried it in another phone and works fine with calls and texts.
IMEI and serial number show the exact ones on the box. I have the latest updated firmware (stock) from Samsung Kies 3 AND Sammobile. Here is a list of pictures from an app I installed prior "Phone INFO Samsung" from the GooglePlay Store.
https://imgur.com/a/grUQt#0
I skipped "DEVICE ID" section as it is 100% legitimate IMEI and Serial Number.
My phone doesn't want to register its mobile network anymore. When I try to make a call or text it says:
http://i.imgur.com/XlIc03J.png
I was reading online for about 2-3days now for possible solutions that can cure this. Such as:
1. Going into Mobile Networks settings and manually register [failed, details below]
2. Going into Mobile Networks settings, hold home button for 2seconds and then hold power button + home button for 15seconds [failed, details below]
3. Taking out battery while the phone is on and remove the SIM card, clean it and re-insert [failed]
4. Factory Reset [Failed]
5. Wipe Storage and re-flash stock ROM [Failed]
6. Turn on airplane mode, restart and turn off [Failed]
7. Reflash stock firmware without SIM card installed [Failed]
8. Completely discharge the battery, recharge [Failed]
Options 1 & 2 do not work because when I try to access Mobile Network Settings I get this:
http://i.imgur.com/JNS9C2Q.png
The SIM card is inside the phone though...
So what I did is found a mobile network options shortcut "program" from GooglePlay Store and installed it. It allows me to access the menu, which is great! Now, when I try to register the SIM card to my correct service provider (BELL CANADA)...it will make me wait for about 1-2minutes before I get "Unable to register, try later" error...even for automatic registration. Here are some more images from my stock from status info page...
http://i.imgur.com/arM0NM6.png
http://i.imgur.com/SsvmPA1.png
If you look, you can see I have full reception on my toolbar at the top...but, when we look at the actual connections everything is unknown and/or disconnected. Even my phone number!
I tried the factory restore with a stock 4.4.2 ROM from Sammobile/Samsung Kies3 and the issue is still there.
Is there anything that anyone knows that can help me resolve this problem? I tried EVERYTHING i can possibly find on Google.
Thank you very much in advance. This is honestly the more unique problem I have ever encountered and i'm in DIRE need of my phone.

Solution!
Bother, I'm sorry to tell you this but you need to restore to the factory rom, through kies on your pc, and after that go to recovery boot and make a back up of your modem and efs, then wipe all data, system, cache, dalvik and internal SD, install rc lite, and restore model and efs!
This works for me every time this happens when trying out new roms, good luck friend!

No sim at start, no network, IMEI is ok

Hello there,
I undertook to unlock the bootloader of my xperia x compact, of course without saving anything (bye the DRM keys), I then used the fastboot to install Paranoid Android v7.2.3, success after the second attempt.
So the phone started very well, but no SIM card recognized at the start of the phone. Possibly PIN code appeared after 10 min of ignition, loop on the "unlocking in progress" and then nothing, no network.
I have been back several times on the official rom via Sony Companion without success. Last night I tried to flash a rom stock with Flashtool. The operation was going well and oh miracle the sim card was detected directly, so I'm configuring the phone and installing all my applications, a reboot after all that and the SIM card had disappeared again.
Since I tried Flashtool several times without success, downgrade to 6.0.1 either.
After hours and hours of research I still do not have the solution, I have crossed several times on forums for the same kind of symptoms but always accompanied by an absent IMEI, but when I type *#06# my IMEI is displayed correctly .
If someone has already encountered this kind of problem I would love to talk to him. Thanks for reading me
Good night
PS: In other bug, the options for developers who freeze or the camera that does not take a picture (freeze when I want to take a picture)
PS2: sorry for my english guys

Did you select your APN under mobile networks
Sent from my F5321 using Tapatalk

9h0s7 said:
Did you select your APN under mobile networks
Sent from my F5321 using Tapatalk
Click to expand...
Click to collapse
Yes I have selected my APN, edited as my carrier said. The biggest problem is that the sim card is not detected immediately at startup. And when the sim lock pop up (about 5min after starting the phone) validation of the pin code is much too long to be normal. The code is accepted but I have no network, and when I try to search manually in the settings I have a loop on 'searching'. I think the problem comes from the modem / radio but I do not know too much these points, I just follow tutorials on the internet.

I say start from scratch but use Flashtool
Sent from my F5321 using Tapatalk

I've already started from scratch with flashtool, several times ...

Some news of my problem.
I have since tried several times to change rom, to flash the modem / radio.
Now my sim card is recognized, but still no network. I have wrote my APN correctly but still nothing.
The network appeared only once after the installation of Paranoid Android, but as in my previous post, after a mobile reboot nothing.
Namely that in the phone information menu, line data service: Disconnected and in this menu enable data connection does not change anything (I can't even enable it). Select radio band gives me 3 choices (Automatic, USA, Japan) and when I click on Automatic I get Set [Automatic] Unsuccessful.
If anyone can help me, I'm really starting to feel hopeless.

xooma37 said:
Hello there,
I undertook to unlock the bootloader of my xperia x compact, of course without saving anything (bye the DRM keys), I then used the fastboot to install Paranoid Android v7.2.3, success after the second attempt.
So the phone started very well, but no SIM card recognized at the start of the phone. Possibly PIN code appeared after 10 min of ignition, loop on the "unlocking in progress" and then nothing, no network.
I have been back several times on the official rom via Sony Companion without success. Last night I tried to flash a rom stock with Flashtool. The operation was going well and oh miracle the sim card was detected directly, so I'm configuring the phone and installing all my applications, a reboot after all that and the SIM card had disappeared again.
Since I tried Flashtool several times without success, downgrade to 6.0.1 either.
After hours and hours of research I still do not have the solution, I have crossed several times on forums for the same kind of symptoms but always accompanied by an absent IMEI, but when I type *#06# my IMEI is displayed correctly .
If someone has already encountered this kind of problem I would love to talk to him. Thanks for reading me
Good night
PS: In other bug, the options for developers who freeze or the camera that does not take a picture (freeze when I want to take a picture)
PS2: sorry for my english guys
Click to expand...
Click to collapse
Hi, i had the same problem. To enter the pin straight away simply go to the quick settings and check if you have the LTE tile there. If not add it. Then hold down on the LTE tile and it should open mobile data settings and then it takes about 5 seconds and it should ask for pin. I have no idea why it is like so but currently i am on paranoid android 7.3.1 and have no problems. Best wishes!

XperiaGUY47 said:
Hi, i had the same problem. To enter the pin straight away simply go to the quick settings and check if you have the LTE tile there. If not add it. Then hold down on the LTE tile and it should open mobile data settings and then it takes about 5 seconds and it should ask for pin. I have no idea why it is like so but currently i am on paranoid android 7.3.1 and have no problems. Best wishes!
Click to expand...
Click to collapse
Hi and thank you for your help
The situation has evolved since, the phone asks for the sim code directly but I still have no network. (see my last message)
Edit : Just noticed that i have an error in flashtool when flashing any rom "those data are not in fsc script and will be skipped reset kernel cmd debug, would you wish to continue ?
Someone ?

xooma37 said:
Some news of my problem.
I have since tried several times to change rom, to flash the modem / radio.
Now my sim card is recognized, but still no network. I have wrote my APN correctly but still nothing.
The network appeared only once after the installation of Paranoid Android, but as in my previous post, after a mobile reboot nothing.
Namely that in the phone information menu, line data service: Disconnected and in this menu enable data connection does not change anything (I can't even enable it). Select radio band gives me 3 choices (Automatic, USA, Japan) and when I click on Automatic I get Set [Automatic] Unsuccessful.
If anyone can help me, I'm really starting to feel hopeless.
Click to expand...
Click to collapse
Are you ticking the wipe boxes with flash tool
Sent from my F5321 using Tapatalk

9h0s7 said:
Are you ticking the wipe boxes with flash tool
Click to expand...
Click to collapse
Yes all boxes.
Here is my phone info
I can't manage to set radio on

Someone ?

Something similar happened to me recently and it was fixed by selecting my provider via wireless networks > mobile networks > service providers
In my case AT&T was selected when I chose Tmo and rebooted everything was fine. Good luck.
Sent from my F5321 using Tapatalk

Oneplus 5 Wi-Fi problem

Hello, i need some help...
I've already searched and tried a lot of ways to fix my problem but nothing worked.
Suddenly the Wi-Fi of my Op5 stopped working, i cant even turn on... And also the phone doesn't recognize sim cards. The phone isn't rooted.
I've already made factory reset, flashed another rom, cleared cache, etc...
Thanks in advance.

Check if Your both sim's IMEI and WLAN MAC address are displayed correctly.
Sounds like corrupted EFS partition to me. Try to restore backup (if You have one). I think You can't fix this issue without a backup. So only way is to send it to OP for repair (i guess on warranty it should be free).

Suddenly no signal in any rom

Hello, yesterday I was trying latest Lineageos16 by @codeworkx and was trying the network options. I selected "GMS/WCDMA/LTE" and since then I cant get any network like if my RIL was broken or something. I tried:
Rebooting the phone
Put airplane mode
Installing 20s firmware again (previously it was already installed)
Coming back to LOS15
Installing a stock rom via fastboot
And the problem is still there, my sim is detected in all roms but I cant get any signal. I need help since I don´t know what to do now.

Gadrok said:
Hello, yesterday I was trying latest Lineageos16 by @codeworkx and was trying the network options. I selected "GMS/WCDMA/LTE" and since then I cant get any network like if my RIL was broken or something. I tried:
Rebooting the phone
Put airplane mode
Installing 20s firmware again (previously it was already installed)
Coming back to LOS15
Installing a stock rom via fastboot
And the problem is still there, my sim is detected in all roms but I cant get any signal. I need help since I don´t know what to do now.
Click to expand...
Click to collapse
I got your PM. But, I don't know which phone you have. As a last resort you can flash my recovery or flash the EFS from my old X727 ( if you have an X727 or X720)
There are several things things that could cause this issue, so I have provided several things to try
If you have tried several Roms, I am betting that you probably wiped but did not format your storage?
FYI Encryption can cause these kinds of issues. I have seen these issues caused by Google as well, and once the account has been restored the sim card will start working again.
Follow the very basic steps below and if that doesn't work, you can try last resort steps that are more drastic and could cause the issue to become unrecoverable. So avoid doing things such as wiping your modems etc. or flashing alternate efs files until you have exhausted all of the possible ways to repair.
Dial *#*#4636#*#* in the dialer
Navigate to Device/Phone Information
Click on “Run Ping Test “
After the Ping test is performed
Click on “Turn Off Radio“
Next, Click on “Turn on SMS over IMS“
No Changes Next >
First try changing to global and then check and make sure that the correct APN is selected under Network&Internet> Mobile Network> Advanced > Preferred Network Type > Choose Global
Next go to Network&Internet> Mobile Network> Advanced >Access Point Names > Choose your correct Network. > If your APN is not listed, enter it manually, click save, then choose new entry.
Go to Network&Internet> Mobile Network> System Select > Should be Automatic
Go to Network&Internet> Mobile Network> CDMA subscription > Should be RUIM/SIM
Check for Signal : If no signal install program from play store called Network Discovery, read instructions and follow suggestions. Usually this program alone will resolve these types of issues ( the free version works fine)
If it does not work Remove the Sim > Wipe sim card off with lint free cloth , ensure that there is no damage to the sim card, Now Reboot > Should work.
No Changes Next >
Start Clean, including formatting storage ( Not WIPE!) Format type yes, Reboot to Recovery then do a full clean wipe.
Reinstall Rom, Gapps, Root > Take out the sim card and setup the phone, Reboot to Recovery, Reinsert Sim card, and boot to system, Open Playstore check for updates.
No Changes Next >
Trying flashing my EFS files from here:
https://forum.xda-developers.com/showpost.php?p=75021582 See Section titled EFS.
If that doe's not work try restoring the recovery, its efs is from a phone that I returned to Amazon. ( so its an alternate EFS)
Last resort
I am not going to tell you this one yet because it can cause a permanent problem. Try everything that I listed above it all else fails you can try the most drastic steps. Which could finally solve your issues but also make the issue worse in a worst case scenario.

tsongming said:
I got your PM. But, I don't know which phone you have. As a last resort you can flash my recovery or flash the EFS from my old X727 ( if you have an X727 or X720)
There are several things things that could cause this issue, so I have provided several things to try
If you have tried several Roms, I am betting that you probably wiped but did not format your storage?
FYI Encryption can cause these kinds of issues. I have seen these issues caused by Google as well, and once the account has been restored the sim card will start working again.
Follow the very basic steps below and if that doesn't work, you can try last resort steps that are more drastic and could cause the issue to become unrecoverable. So avoid doing things such as wiping your modems etc. or flashing alternate efs files until you have exhausted all of the possible ways to repair.
Dial *#*#4636#*#* in the dialer
Navigate to Device/Phone Information
Click on “Run Ping Test “
After the Ping test is performed
Click on “Turn Off Radio“
Next, Click on “Turn on SMS over IMS“
No Changes Next >
First try changing to global and then check and make sure that the correct APN is selected under Network&Internet> Mobile Network> Advanced > Preferred Network Type > Choose Global
Next go to Network&Internet> Mobile Network> Advanced >Access Point Names > Choose your correct Network. > If your APN is not listed, enter it manually, click save, then choose new entry.
Go to Network&Internet> Mobile Network> System Select > Should be Automatic
Go to Network&Internet> Mobile Network> CDMA subscription > Should be RUIM/SIM
Check for Signal : If no signal install program from play store called Network Discovery, read instructions and follow suggestions. Usually this program alone will resolve these types of issues ( the free version works fine)
If it does not work Remove the Sim > Wipe sim card off with lint free cloth , ensure that there is no damage to the sim card, Now Reboot > Should work.
No Changes Next >
Start Clean, including formatting storage ( Not WIPE!) Format type yes, Reboot to Recovery then do a full clean wipe.
Reinstall Rom, Gapps, Root > Take out the sim card and setup the phone, Reboot to Recovery, Reinsert Sim card, and boot to system, Open Playstore check for updates.
No Changes Next >
Trying flashing my EFS files from here:
https://forum.xda-developers.com/showpost.php?p=75021582 See Section titled EFS.
If that doe's not work try restoring the recovery, its efs is from a phone that I returned to Amazon. ( so its an alternate EFS)
Last resort
I am not going to tell you this one yet because it can cause a permanent problem. Try everything that I listed above it all else fails you can try the most drastic steps. Which could finally solve your issues but also make the issue worse in a worst case scenario.
Click to expand...
Click to collapse
Ok, first of all thanks for that deatailed guide. Unfortunately I sadly need the last resort and how to do it.

Gadrok said:
Ok, first of all thanks for that deatailed guide. Unfortunately I sadly need the last resort and how to do it.
Click to expand...
Click to collapse
Seriously ?
Okay, here is my two second answer : Use QPST
Edit:
Basically at your risk delete your modems via adb
First make sure that you have your own efs backup by using TWRP > Backup. Next wipe your modems
Boot into fastboot
1. adb reboot bootloader
2. fastboot erase modemst1
3. fastboot erase modemst2
4. fastboot erase cache
5. fastboot reboot ( Check for signal in system > if no go to link below.
You didn't spend anytime telling me about what phone you have, what you have actually tried etc.. I don't have time or the motivation to write easy to understand step by steps.
Thankfully someone has provided the steps already:
1. Use Chrome Browser on your desktop with the Google Translate extension installed and activated.
2. Follow the instruction listed on 4PDA here: http://4pda.ru/forum/index.php?showtopic=876414&view=findpost&p=72854643

Edit 2
You could also just wait for next Lineage update. Although, I am not experiencing any issues apparently other people are dealing with issues also. The next update may solve it. If possible wait before doing the drastic steps mentioned above.
Sent from my LEX727 using XDA Labs

@tsongming Currently I am experiencing almost the same problem. I just bought Le Pro3 US version (x727) a couple weeks ago. It came with US 18s firmware if I am not mistaken. Then I upgraded to Chinese firmware 26s, unlocked the boot loader and installed TWRP. So now I have the x720 baseband. After that I played around with several ROM, AICP 14.0 and LOS 16.0 without any problem.
Two days ago I installed LOS 16.0 4 March nightly build. Everything mostly work and I got LTE connection. Suddenly yesterday morning, when I was at home I noticed the phone just has H+. Restarting the phone didn't help. So I just went to office using train. In the train, I realized it changed back to LTE. I played with the phone and suddenly it changed back to H+. So I changed the setting to LTE only but it didn't help. Restarting the phone also didn't help. So currently my phone stuck with H+.
I have tried several things:
1. Flash the x720 firmware
2. Flash AICP 14.0 official
3. Reformat internal storage and full wipe other partitions as you mentioned above and flash LOS 16.0 5 march nightly
All failed to solve the problem.
Currently I am thinking to flash the original 26S Chinese version back. In your opinion, will it help?