Database Users

S7edge SM-G9350-NO 4G DATA**I WILL DONATE $50-$100 TO WHOEVER GIVES ME THE SOLUTION**

The exact model is Samsung Galaxy S7 edge SM-G9350 64 GB GOLD PLATINUM
First I want to get this off my chest. I registered this week (I used XDA before like 7 or 8 years ago in high school when I use to flash custom ROMS on windows mobile phones-good times hehe)because I am frustrated since I bought an unlocked Samsung Galaxy S7 edge from a stranger using craigslist on Sunday night. The ad said it was T-mobile Unlocked and in brand new condition with the box and original accessories and it had some pictures.So why not buy it cheap for since I'm using a T-mobile LG-K7 with a cracked screen,right?WRONG!! The phone is working fine except I am only getting EDGE data!!! I found out that it is a chinese variant and it works fine with my T-mobile sim card here in the U.S.A except it can't connect to 4G and that is probably why the shady guy sold the phone cheap to let it become someone else problem I also saw 1 or 2 of these models in the box as well and he said a friend gave it to him and he is just selling it(B.S.) I forgot craigslist had scammer like 40% of the transactions lol, I use to meet these types of people in middle and high school when I bought and sold my used or old T-mobile phones though I never scammed or conned any one.I remember some people would act shady or too nice for no reason,probably cause they stole the phone and were making 100% profit off me.This same guy is one of them.
ANYWAYS THANK YOU FOR READING MY RANT---- NOW ON TO THE POINT OF FIXING THE DATA ISSUE
I am getting unlimited 4G on my k7 and everyone else on our plan is using unlimited 4g just fine.Samsung rep at best buy said its legit and its an international chinese variant and to look around on here to fix the issue. He told me something about the band and t-mobile towers to pick up the frequency. He said I got a really good deal if I can 4g on there. If not than re-sell it and make it someone elses problem. I looked all around google the past few days an either no one has this problem or if they do than the solution doesn't work on my phone.
Here is what I tried so far:
A) T-mobile reset the network connection via tech support
B) I factory reset the phone numerous times
C)I got the right APN settings set on the phone to be connected to nearest towers, a store rep did it for me to make sure.
D) I replaced and used another activated T-mobile sim card
E) I download some apps I saw on here to check LTE signal etc and its running very slow edge
*********I am on the sim status screen and right now as I'm typing this the signal strength is
-61 dBm 26 asu,cellular network type is EDGE,NETWORK is T-mobile, Service state is In service,Roaming is not roaming,cellular network state is disconnected*******
------I hope someone can pick up information off of that and maybe I could change some settings
E) I dialed *#*#4636#*#* and got to a screen to allow me to check phone information,battery information,usage statistics,wi-fi information-under phone information there are options to set preferred network types to: WCGMA,GSM, GSM auto(PRL), CDMA auto(PRL),CDMA only,EvDo only,GSM/CDMA auto(PRL),LTE/CDMA auto(PRL),LTE/GSM(PRL),CDMA auto(PRL),LTE only,Unknown. It will only stay on up to GSM auto(PRL)
....also when I press menu on this screen there is an option to enable data connection and when I click it,it won't stay,it just keeps saying enable data connection
F)I googled what bands this model and it is able to use and it has the capability to be used on T-mobile bands
What else can I do get the data working to 4G right now? The phone is running Android 6.0.1 and won't update to Nouget over the air. I want to root the phone and see if I can install a custom Nouget rom( since the samsung guy said the phone will brick if I try to install the T-mobile Nouget rom or I can't even do it since its an international variant-by the way I am able to have google services on here like play store,etc. so I don't know if that makes a difference to what variant and rom it is because I heard one or the other of hong kong or open china variants for this phone is better and can't use google play)and maybe I am able to connect to 4G data.
Like the title of this post says, I promise I will back up my donation I really don't want to sell the phone unless I have to because I will not get a better deal anywhere ever again for the latest high end phone from a manufacturer

Quick search gives this https://forum.xda-developers.com/s7...g9350-nougat-final-hkrom-alpha-02-18-t3558844
Sent from my SM-G935V using Tapatalk

you have to flash the correct CSC this will fix your 4G if you buy an device from a other country than is it possible that you get this problem but when you flash the correct CSC you will get 4G i helped so much people with this problem with a S7 device, i think this your solution
if this fix works for you just keep your money we are developers not for paying

Maybe you should post this in the T-Mobile section.
In my idea this should have 4G data on T-Mobile US out of the box as the required LTE bands are supported by the G9350. Did you check the APN settings? (VoLTE and WiFi-Calling may or will not work without t-mo-rom but that's another topic)
Also you should be fine to flash a T-Mobile US rom as both have Snapdragon SoC. You don't need root to flash an official rom.
Out of curiosity: what about 3G?

rientkill1 said:
you have to flash the correct CSC this will fix your 4G if you buy an device from a other country than is it possible that you get this problem but when you flash the correct CSC you will get 4G i helped so much people with this problem with a S7 device, i think this your solution
if this fix works for you just keep your money we are developers not for paying
Click to expand...
Click to collapse
Thank you so much!!! People have actually asked through pm to donate to bitcoin first before helping me and here you are helping me first by the way.
I am going to find the correct CSC, what does that stand for? Can I flash a T-mobile 7.0 Nougat rom on my Galaxy SM-9350 first that the person before you replied about(its the link)?? I want to do both to have T-mobile settings and to use the 4G although the 4G is a thousand times more important. If I can do this than I am a happy man!
Why is there a boot loader and modem link attached to every post containing a ROM download? Does that need to be downloaded first,and what are the next steps,if so? I know these are questions I need to search about they are all confusing and mumbled and jumbled up. Even though I registered this week for help I was a member here like 8-9 years ago in high school when I was flashing custom ROMS on Windows mobile phones(good times hehe) but it got addictive,took a lot of my time from studying, and I totally forgot how do things.

andiling said:
Maybe you should post this in the T-Mobile section.
In my idea this should have 4G data on T-Mobile US out of the box as the required LTE bands are supported by the G9350. Did you check the APN settings? (VoLTE and WiFi-Calling may or will not work without t-mo-rom but that's another topic)
Also you should be fine to flash a T-Mobile US rom as both have Snapdragon SoC. You don't need root to flash an official rom.
Out of curiosity: what about 3G?
Click to expand...
Click to collapse
Hey I made a new thread today in Q&A for GS7. The APN settings were put in by a T-mobile store associate and it still didn't work. I don't care about VoLTE/Wifi-Calling although I noticed some people on here are worred about that-its just something I never use.
Are you sure I don't need root to flash an official ROM?The Samsung Galaxy guy at Best Buy said it would brick if I used an official ROM because the phone is an international variant. If I can use an official ROM,I can't get Nougut OTA via T-mobile anyway as my phone keeps saying it is updated even though it is 6.0.1. How do I get the offical ROM manually on the computer? Samsung Smart Switch isn't even recognizing my device when it is connected and Smart Switch on my phone looks like it is only suppose to be used to receive files from another phone? I have the link for a T-mobile 7.0 ROM from a post on here that he used on the same exact model I don't know if I am suppose to root the device first or not yet since it looks custom made.
Thank You for helping me out it means a lot you guys are the best! I can already see myself on here a lot in the future doing stuff different android phones like I 8 or 9 years ago in high school on windows mobile phones.

andiling said:
Maybe you should post this in the T-Mobile section.
In my idea this should have 4G data on T-Mobile US out of the box as the required LTE bands are supported by the G9350. Did you check the APN settings? (VoLTE and WiFi-Calling may or will not work without t-mo-rom but that's another topic)
Also you should be fine to flash a T-Mobile US rom as both have Snapdragon SoC. You don't need root to flash an official rom.
Out of curiosity: what about 3G?
Click to expand...
Click to collapse
The only data I am getting is EDGE

So, I guess something is wrong.
You can try flashing the designated firmware for this device first and see if this helps. To get the right one (who knows what all was tampered with) use best the Phone Info tool.

I've had this exact issue before, with a Nexus 5 that I bought from Telus, I am with Telus, it ended up being I had to go buy and register a new SIM card, then it was fine, might not be a solution for you but Worth a try,
Actually get a SIM card from your provider, have them register it in the store
Sent from my SM-G935W8 using XDA-Developers Legacy app

Thanks I did that yesterday already and it still didn't work
I am a member because the owner hates the Iphone and I respect that

What would be the correct CSC file for this device? I tried to flash CSC from a SM-G935t firmware and it didn't work even though she said it didn't matter lol(senior member too)
I am a member because the owner hates the Iphone and I respect that

I'm going to try to find an official U.S. T-mobile ROM and flash with odin...but does it have to be specifically for SM-G9350? I don't think I can find one for that......
I am a member because the owner hates the Iphone and I respect that

1) Download this https://dl.twrp.me/hero2lte/twrp-3.1.0-0-hero2lte.img.tar.html and WAIT.
2) Download superman ROM: https://www.androidfilehost.com/?fid=817550096634750162
I choosed this rom cause it got nougat bootloader and kernel. Also download CSC chooser zip: https://www.androidfilehost.com/?fid=745425885120710484
3) Install twrp via ODIN and uncheck auto reset in odin. Then press power + home + volup to go to recovery. Put the superman rom and CSC chooser zip files on Sd card and put back in phone.
4) Install Superman rom,in aroma pick superstock kernel 'samsung pay and knox work' and install/update everything especially the bootloader. In mods stick to stock as possible.
5) Install the CSC zip file and choose t-mobile USA.
6) reboot and pray everything works LOL
I'm not responsible for any damage that might occur but if ir worked donations are welcome to help a medical student here

modaifallah said:
1) Download this https://dl.twrp.me/hero2lte/twrp-3.1.0-0-hero2lte.img.tar.html and WAIT.
2) Download superman ROM: https://www.androidfilehost.com/?fid=817550096634750162
I choosed this rom cause it got nougat bootloader and kernel. Also download CSC chooser zip: https://www.androidfilehost.com/?fid=745425885120710484
3) Install twrp via ODIN and uncheck auto reset in odin. Then press power + home + volup to go to recovery. Put the superman rom and CSC chooser zip files on Sd card and put back in phone.
4) Install Superman rom,in aroma pick superstock kernel 'samsung pay and knox work' and install/update everything especially the bootloader. In mods stick to stock as possible.
5) Install the CSC zip file and choose t-mobile USA.
6) reboot and pray everything works LOL
I'm not responsible for any damage that might occur but if ir worked donations are welcome to help a medical student here
Click to expand...
Click to collapse
Nice, I like what you have! My model is different so I don't know if the ROM will work though I'm almost finished downloading it at the moment. Instructions 3 and 4 is confusing. Don't I need to put superman ROM and CSC file on sd card while the phone is ON?And am I suppose to transfer it on there via usb cable or can I also do it via google drive than open in up phone gmail and put it on sd card? Also do I need to extract the CSC file first to my computer desktop? That file takes forever to extract! Is instruction 4 suppose to be while in recovery mode? Also is it normal for my phone to show "no command" while in recovery mode?

Thank you ?
The rom will work because your phone is exynos based. It got a different model number because it's for Chinese markets. Put the rom on the SD card using whatever method, just do it before flashing the recovery, because your phone may not boot after the recovery to the stock firmware because Samsung has put some crap to prevent using custom firmware. I forgot to say that also before doing anything go to device info - > software - > and press build number several times to enable developer options then back to settings and go to developer options and enable OEM unlocking.
Yes, commands 4 are made in recovery. Install - > pick the zip file and install.
All zip files aren't extracted! The recovery uses the zip file as it is.
Good luck

okaythan24 said:
I'm going to try to find an official U.S. T-mobile ROM and flash with odin...but does it have to be specifically for SM-G9350? I don't think I can find one for that......
I am a member because the owner hates the Iphone and I respect that
Click to expand...
Click to collapse
Were you able to flash the U.S. T-mobile ROM onto SM-9350?
The official firmware can be found on https://www.sammobile.com/firmwares/database/SM-G935T/

I found it yesterday but their free server is under maintenance so he will have to pay to just download a firmware file.
I don't know why don't samsung provide them for free on their site!

{v20 ls997 sprint} unclock code for stock sprint rom {for non-sprint sim}

1st I checked for any posts or threads for my question no results so here we go
I have 3x ls997 one bricked (100% my fault I did something stupid to brick it), one (my 1st one) santa rooted & custom rom (sim-unlocked) today I got 3rd one (again ls997 still full stock out of the box) as replacement for my bricked one. Thing is I want to sim-unlock the stock sprint rom as is out of the box by paying for the service. Tried androidsimunlock but they got me "unavalable unlock code" and refunded me (attached photo). Any suggestions will be welocmed. Phone is sprint bad esn but I live in Europe that's why I bought bad esn since it doesn't matter for international use once you got it unlocked somehow. Thank you for reading. :good:

niki.b said:
1st I checked for any posts or threads for my question no results so here we go
I have 3x ls997 one bricked (100% my fault I did something stupid to brick it), one (my 1st one) santa rooted & custom rom (sim-unlocked) today I got 3rd one (again ls997 still full stock out of the box) as replacement for my bricked one. Thing is I want to sim-unlock the stock sprint rom as is out of the box by paying for the service. Tried androidsimunlock but they got me "unavalable unlock code" and refunded me (attached photo). Any suggestions will be welocmed. Phone is sprint bad esn but I live in Europe that's why I bought bad esn since it doesn't matter for international use once you got it unlocked somehow. Thank you for reading. :good:
Click to expand...
Click to collapse
unlock it with dirty santa, then flash the us996 rom. it will be unlocked.

Team DevDigitel said:
unlock it with dirty santa, then flash the us996 rom. it will be unlocked.
Click to expand...
Click to collapse
that's what I did successfully on my 1 of 3 lg v20 the one I use for myself actually. the thing is after 2 months with us996 rom (used us996 original deodexed rom the original file from december not us996 .kdz which I tried and changes the modem therefore I loose all connections (no service)) the phone becomes more and more super slow. I mean really slow. I have zero to non apps installed. I don't even play games. Also not heavy user in all aspects. ALso there are no OTA you must download new custom rom every time and flash using the existing already twrp since santa rooted.
I love how stock sprint rom works. Fast, reliable, don't mind the bloatware. Also awesome to have hard reset working from the menu not only using fastboot commands. also OTA updates working is great because this phone is getting android 8 (yes a lot of time until that happened)

niki.b said:
that's what I did successfully on my 1 of 3 lg v20 the one I use for myself actually. the thing is after 2 months with us996 rom (used us996 original deodexed rom the original file from december not us996 .kdz which I tried and changes the modem therefore I loose all connections (no service)) the phone becomes more and more super slow. I mean really slow. I have zero to non apps installed. I don't even play games. Also not heavy user in all aspects. ALso there are no OTA you must download new custom rom every time and flash using the existing already twrp since santa rooted.
I love how stock sprint rom works. Fast, reliable, don't mind the bloatware. Also awesome to have hard reset working from the menu not only using fastboot commands. also OTA updates working is great because this phone is getting android 8 (yes a lot of time until that happened)
Click to expand...
Click to collapse
Ota will never work once you dirty santa. Have to patch the ota after it is dl or boot loop. But i understand wanting the rom to run faster. You may be able to flash a dif. Boot.img and get it to run quicker on us996. And yeah i wouldnt recommend restoring a ls997 with the us996 kdz.

You can SIM unlock your LS997 using Octoplus LG unlock.
It is up to you to decide will you do it by yourself or use help here's how it looks.
There are a lot of re-sellers also on eBay, for example this one
P.S.: As far as the problem is with the kernel and alot of system garbage for this device you'll get same lags in several months of usage of course even using stock Sprint FW...

Samsung galaxy note 3 Verizon help help help

Actually i am from india and i bought an samsung verizon note 3.. It was good before also i was able to use airtel 4g also.. But one of my friend installed stock rom and the mobile does not showing 4g at all.. I tried to root the phone but faiked to root... Please developer help me to install a custom rom and help me to use the phone with 4g

dipankar.c2bs said:
Actually i am from india and i bought an samsung verizon note 3.. It was good before also i was able to use airtel 4g also.. But one of my friend installed stock rom and the mobile does not showing 4g at all.. I tried to root the phone but faiked to root... Please developer help me to install a custom rom and help me to use the phone with 4g
Click to expand...
Click to collapse
The problem is the APN and you can not modify it. Contact your carrier and see if they can assist.
Sent from my SM-N900V using Tapatalk

ehrn i purchased the phone it was perfect. connecting internet was showing 4g.. but when i installed this original Verizon rom it became difficult.. now i am unable to root and install custom recovery... please guide me to root and install custom recovery TWRP and i want to install custim rom.. please help

@dipankar.c2bs
You might look into getting your CSC "sales_code" changed. I'm not sure if that is entirely the problem, but it is likely related. Even the USA Verizon ROMs come preloaded with databases that are used to provide custom parameters for a variety of carriers and locations world-wide. (See the file /system/csc/imsprofile.xml for example) I suspect the way this information is actually used is through the "sales_code" CSC value, but I'm not 100% sure of that.
I'm guessing you want "INS" or "INU" instead of VZW
What you currently have:
Code:
getprop | grep -i csc
If your handset is supported by Airtel, one of their technicians will probably know how to do the CSC change, possibly without even rooting the phone.
If it not supported, they probably will be under orders of their employer not to help you at all. But, is is easier for them to give you advice face-to-face, rather than over the telephone (subject to monitoring), if that is possible.
A question to ask - a form of social engineering - is this: "do you know of someone in the area that can help me for a small fee?"
[EDIT]
There is one other possibility for a non-rooted phone. I really don't know if this would work (I am speculating here), but the basic idea is to apply a CSC for a closely related device Model (a SM-N90???? Qualcomm model, hopefully for CDMA/LTE) that is for your country and carrier on top of your existing ROM using Odin. Get the CSC file from Sammobile, and:
- wipe the entire phone using the stock recovery. (You can remove the external SD card first if you like)
- boot the phone, shut down, boot into stock recovery.
- wipe the entire phone again in the stock recovery
- boot into Odin and flash the CSC in the CSC slot.
- boot the phone; do a minimal configuration and see if you have the service you want.
Note that @donc113 s advice given above is the right place to start: ask your service (Airtel) to help you before you try anything yourself.
good luck.

when i purchase it was good... there was 4g indicator also.. no verizon boot screen.. but now it dont works..

dipankar.c2bs said:
when i purchase it was good... there was 4g indicator also.. no verizon boot screen.. but now it dont works..
Click to expand...
Click to collapse
One of your friends who installed the stock ROM apparently didn't understand the consequences of what he did. Stock ROMs set the APN for Verizon. Did this friend happen to make a backup before he did the ROM switch?
Sent from my SM-N900V using Tapatalk

no he have not back up the previous rom

Knox?

Moto g5 plus, single SIM, no LTE on custom ROM?!

Moto g5 plus 64g (single SIM),unlocked bootloader, root...4g works fine on stock ROM rooted w/Xposed
. ..and that's great but Ive flashed custom ROMs
Resurrection
...and Halogen
... and Desolation
... and they are very nice ROM s but I only get 3g (no LTE) and the only info I find on this is a quick-fix w/jio SIM using a DUAL SIM. .... Am I the only unlucky human w/a single SIM 3g problem?
I was so excited about this phone, thought I did all of my research , bought TWO 64g g5 plus phones(not 32g no way because I wanted to BEST lol but its single sim, stupid me).
...should I just give up on custom ROMs ? ...or is there something can be done?
Ive being at this for 2 weeks now...Any/all info very appreciated.

I would've posted in other forum but wouldn't let me due to lack of status....or rep...or bling..or something.

Do you have correct APN set? On some custom ROMs I have installed I had to change APN, because it was set to first in the list by default.

I dont know much about APN ...not durecwhst it's suppose to be set at..im boost mobile.. I'll start researching that next ..thanks brother

No luck.
I found the APN settings on Boost mobile site, I set/saved that to no avail.
I went back to stock/rooted and 4g works fine. But no matter which custom ROM I use I still only have 3g.
Surely someone somewhere knows how to set/fix this.
Can a Mod move this to where someone may have hands-on with this 3g vs 4g issue? Dev or someone?

Month later...5 custom roms later...still either no 4g on custom rom or no camera on simple root w magisk. I still can't post in Dev forum.

No LTE
Bigmotoxer said:
Month later...5 custom roms later...still either no 4g on custom rom or no camera on simple root w magisk. I still can't post in Dev forum.
Click to expand...
Click to collapse
Have the same problem, how did u go back to stock? TWRP restore? or did you fastboot flash stock fireware? I'm not sure if it makes a difference but after reading a few of these it looks like stock firmware may need to be reflashed with fastboot then start flashing custom ROMs with twrp. If you get the answer let me know if i find out I'll let you know?
Thanks
Update: yes there are ROMs that will fix the LTE problem, I was reading someone with a connection problem someone suggested downloading stock debloated , another suggested AOKP, downloaded both , first I tried debloated got LTE , then flashed the other, for VoLTE. Also I'm not sure if this is correct or not but fastboot flashing modems may work I'm not exactly sure and would need to look it up further is something else I read but didn't try as its 2:00am and I'm being yelled at by a hidden speaker in my kitchen which is why it took so long for me to even try to look for a reason because I've been getting yelled at so long I think I got cancer, I hope Santa brings them a tall glass of shut the f up so I get one day without being yelled at , also Lineage 15 says LTE working. I haven't used it since I don't want to mess with 8.0 right now. MeryXMaz

I'm havin the same issue. Also with Boost Mobile. Most other devices I've rooted have had some sort of boost/sprint/virgin APN fix .zip. But I donno....

RozWellZ said:
Have the same problem, how did u go back to stock? TWRP restore? or did you fastboot flash stock fireware? I'm not sure if it makes a difference but after reading a few of these it looks like stock firmware may need to be reflashed with fastboot then start flashing custom ROMs with twrp. If you get the answer let me know if i find out I'll let you know?
Thanks
Update: yes there are ROMs that will fix the LTE problem, I was reading someone with a connection problem someone suggested downloading stock debloated , another suggested AOKP, downloaded both , first I tried debloated got LTE , then flashed the other, for VoLTE. Also I'm not sure if this is correct or not but fastboot flashing modems may work I'm not exactly sure and would need to look it up further is something else I read but didn't try as its 2:00am and I'm being yelled at by a hidden speaker in my kitchen which is why it took so long for me to even try to look for a reason because I've been getting yelled at so long I think I got cancer, I hope Santa brings them a tall glass of shut the f up so I get one day without being yelled at , also Lineage 15 says LTE working. I haven't used it since I don't want to mess with 8.0 right now. MeryXMaz
Click to expand...
Click to collapse
Thanks for responding. I still haven't found a fix for the LTE. I will try to aokp again maybe something has been fixed or added. I did fix my camera problem by flashing elementalX so that's good. But not having LTE is not cool. And I also did not want to message w 8.0 yet.

So I tried AOKP to no avail. Still no 4g/LTE. That's time I'll never get back lol.

had the same problem XenonHD seems to work well...

I'll try it thanks

Hoping it'll get better with the official 8.0 release.

Delayed Texts and Unknown Carrier with Custom ROMs (7.1.2 / 8.1) on Verizon S5-G900V

So I have posted before without any replies and am still seeking help...
I know there are others out there in the same situation as me:
On an Unlocked VZW bootloader
On Verizon Wireless 4G LTE in the US
Trying to run a Custom ROM on their phone
But for some reason, I seem to be the only one who has a random delayed texts (both SMS and MMS) issue (by 1-15 minutes) on these forums. Sometimes on Custom ROMs the texts come in normally but other times there is a long delay and it makes having a conversation with people very difficult and irritating. There is NO text delay on rooted (Magisk) QL1, the latest Samsung stock TW S5 6.0.1 ROM, and I have gone back to it since I have no more ideas left to try.
What I have tried:
AEX 5.8 (Oreo 8.1), Havoc OS (8.1), Lineage 15.1 (Latest 8.1), crDroid 3.8.5 (7.1.2), MoKee (7.1.2), AOKP (7.1.2)
Changing APN settings to include the MMSC http://mms.vtext.com/servlets/mms and leave blank which is the default on Custom/Stock ROMs
Changing APN settings to match the stock VZW settings exactly
Flashed new VZW APN files from an ltefix.zip file I found on XDA
Changing CDMA to be Home and not just Automatic
Changing from Global to CDMA/LTE+EVDO
Went to the Verizon store and got a new SIM card
Booted up without SIM and powered off; then inserted SIM and booted up again
Tried different Modem/Non-HLOS versions like QC2 and QL1
Went into the secret *#*#4636#*#* Phone menu to see what differences exist between stock and Custom ROM settings
Added some lines from the stock VZW Build Prop to Custom ROM Build Prop
Removing HD Voice/VoLTE from my Verizon account
Avoided installing any apps after flashing a Custom ROM to see if the problem remained
Nothing worked! Still get Delayed Texts trying everything I could think of, except when on the stock VZW ROM. Custom ROMs may boot up showing my carrier as Verizon Wireless, but then after some random amount of time will show the Carrier as either "Unknown" (7.1.2) or "Roaming Indicator Off" (8.1). It is usually at that time when the Delayed Texts issue arises once the phone loses its lock on Verizon.
This makes me think it is a Verizon Band issue where for some reason not enough Bands are available for my phone to use on these Non-Verizon Custom ROMs. Or it could have something to do with VoLTE being active on my account at one point (I turned it off on My Verizon to try to combat this problem). Or maybe something to do with how we all unlocked the bootloader in the same way.
But what I don't understand is why I am the only person with this issue since I am pretty sure there are a lot of people on Verizon with CID 15 on Custom ROMs who don't seem to be mentioning this problem!
Any thoughts on how to fix it? Could it be a matter of augmenting the Bands my phone has access to on the Custom ROMs?
Thank you very much!
Drew

drewcu said:
So I have posted before without any replies and am still seeking help...
I know there are others out there in the same situation as me:
On an Unlocked VZW bootloader
On Verizon Wireless 4G LTE in the US
Trying to run a Custom ROM on their phone
But for some reason, I seem to be the only one who has a random delayed texts (both SMS and MMS) issue (by 1-15 minutes) on these forums. Sometimes on Custom ROMs the texts come in normally but other times there is a long delay and it makes having a conversation with people very difficult and irritating. There is NO text delay on rooted (Magisk) QL1, the latest Samsung stock TW S5 6.0.1 ROM, and I have gone back to it since I have no more ideas left to try.
What I have tried:
AEX 5.8 (Oreo 8.1), Havoc OS (8.1), Lineage 15.1 (Latest 8.1), crDroid 3.8.5 (7.1.2), MoKee (7.1.2), AOKP (7.1.2)
Changing APN settings to include the MMSC http://mms.vtext.com/servlets/mms and leave blank which is the default on Custom/Stock ROMs
Changing APN settings to match the stock VZW settings exactly
Flashed new VZW APN files from an ltefix.zip file I found on XDA
Changing CDMA to be Home and not just Automatic
Changing from Global to CDMA/LTE+EVDO
Went to the Verizon store and got a new SIM card
Booted up without SIM and powered off; then inserted SIM and booted up again
Tried different Modem/Non-HLOS versions like QC2 and QL1
Went into the secret *#*#4636#*#* Phone menu to see what differences exist between stock and Custom ROM settings
Added some lines from the stock VZW Build Prop to Custom ROM Build Prop
Removing HD Voice/VoLTE from my Verizon account
Avoided installing any apps after flashing a Custom ROM to see if the problem remained
Nothing worked! Still get Delayed Texts trying everything I could think of, except when on the stock VZW ROM. Custom ROMs may boot up showing my carrier as Verizon Wireless, but then after some random amount of time will show the Carrier as either "Unknown" (7.1.2) or "Roaming Indicator Off" (8.1). It is usually at that time when the Delayed Texts issue arises once the phone loses its lock on Verizon.
This makes me think it is a Verizon Band issue where for some reason not enough Bands are available for my phone to use on these Non-Verizon Custom ROMs. Or it could have something to do with VoLTE being active on my account at one point (I turned it off on My Verizon to try to combat this problem). Or maybe something to do with how we all unlocked the bootloader in the same way.
But what I don't understand is why I am the only person with this issue since I am pretty sure there are a lot of people on Verizon with CID 15 on Custom ROMs who don't seem to be mentioning this problem!
Any thoughts on how to fix it? Could it be a matter of augmenting the Bands my phone has access to on the Custom ROMs?
Thank you very much!
Drew
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When you are on stock you are seeing the verizon lte correct? It not showing unkown?
I have a CID 15 I can try and see if that one is having an issues. it has an older lineage rom on it but it should still work for a test.

Fear_The_Fluff said:
When you are on stock you are seeing the verizon lte correct? It not showing unkown?
I have a CID 15 I can try and see if that one is having an issues. it has an older lineage rom on it but it should still work for a test.
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Yes, stock shows Verizon as the Network in Settings/About Phone/Status and Verizon Wireless as Carrier and LTE as Type in the secret phone settings page I get to through the app Advanced Signal Status.
Appreciate your assistance in testing Lineage on your CID 15. Since no one else seems to be complaining I have a feeling it will show as Verizon as you'd expect. Feels very lonely on my island lol, but at least rooted stock with Xposed is livable for now.

drewcu said:
Yes, stock shows Verizon as the Network in Settings/About Phone/Status and Verizon Wireless as Carrier and LTE as Type in the secret phone settings page I get to through the app Advanced Signal Status.
Appreciate your assistance in testing Lineage on your CID 15. Since no one else seems to be complaining I have a feeling it will show as Verizon as you'd expect. Feels very lonely on my island lol, but at least rooted stock with Xposed is livable for now.
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No issues with my S5, but I later remembered this post:
https://forum.xda-developers.com/galaxy-s5/help/solved-unknown-baseband-fixed-t3680402
Try it, I know it was a huge problem awhile back, maybe this will help you.

Fear_The_Fluff said:
No issues with my S5, but I later remembered this post:
https://forum.xda-developers.com/galaxy-s5/help/solved-unknown-baseband-fixed-t3680402
Try it, I know it was a huge problem awhile back, maybe this will help you.
Click to expand...
Click to collapse
Thanks for trying! Assume you waited a while with the S5 in Lineage before responding because mine will start as Verizon but then after 1-30 minutes will switch over to Unknown.
Yeah I recently came across the same post in my research on this. Seems like most of the people who used that guide weren't able to do anything with their modem like call or had missing SIM card messages. I have always had the ability to call except when I debloated the stock ROM too much lol! I am hesitant to start deleting modem files and find myself in worse trouble than I am in now when stock works perfectly (aside from the lagginess).
Besides this issue with Lineage Oreo, I also found AOSP Extended Oreo to be a huge battery hog because my phone ran HOT (but maybe it's related to my main modem? issue). On stock, I almost never find the thing getting warm, it's just not as smooth as Oreo is. I am going to let S5 Oreo mature further and improve on the battery performance before going back to it I think and just stay on working stock for now. If I had concrete evidence that my daily driver could be fixed without any risk, I might consider following instructions.
Appreciate your assistance regardless since no one else has really made any suggestions!
Thank you!
Drew

drewcu said:
Thanks for trying! Assume you waited a while with the S5 in Lineage before responding because mine will start as Verizon but then after 1-30 minutes will switch over to Unknown.
Yeah I recently came across the same post in my research on this. Seems like most of the people who used that guide weren't able to do anything with their modem like call or had missing SIM card messages. I have always had the ability to call except when I debloated the stock ROM too much lol! I am hesitant to start deleting modem files and find myself in worse trouble than I am in now when stock works perfectly (aside from the lagginess).
Besides this issue with Lineage Oreo, I also found AOSP Extended Oreo to be a huge battery hog because my phone ran HOT (but maybe it's related to my main modem? issue). On stock, I almost never find the thing getting warm, it's just not as smooth as Oreo is. I am going to let S5 Oreo mature further and improve on the battery performance before going back to it I think and just stay on working stock for now. If I had concrete evidence that my daily driver could be fixed without any risk, I might consider following instructions.
Appreciate your assistance regardless since no one else has really made any suggestions!
Thank you!
Drew
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Click to collapse
I tried this one once when my old sprint S5 didn't have 4G. I ended up with no network at all, I had to do a forget network and reboot to get everything back. I never got that phone fixed I know there is another forum about that issue as well:
https://forum.xda-developers.com/galaxy-s5/help/galaxy-s5-galaxy-note-3-sprint-help-t3698708
Most people were able to get it fixed by replacing the SIM, but since you did that I didn't mention this post.
UPDATE:
Forgot to ask, have you tried a different messenger? I know it wont fix you unknown errors but I thought I'd ask. Also, when you did the modem update, was it this update: https://forum.xda-developers.com/verizon-galaxy-s5/development/modem-modems-t3154630

Fear_The_Fluff said:
I tried this one once when my old sprint S5 didn't have 4G. I ended up with no network at all, I had to do a forget network and reboot to get everything back. I never got that phone fixed I know there is another forum about that issue as well:
https://forum.xda-developers.com/galaxy-s5/help/galaxy-s5-galaxy-note-3-sprint-help-t3698708
Most people were able to get it fixed by replacing the SIM, but since you did that I didn't mention this post.
UPDATE:
Forgot to ask, have you tried a different messenger? I know it wont fix you unknown errors but I thought I'd ask. Also, when you did the modem update, was it this update: https://forum.xda-developers.com/verizon-galaxy-s5/development/modem-modems-t3154630
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Click to collapse
Thanks for the quick reply!
You tried the deleting the modems fix or the link in your prior post for your Spring S5? And what is a "forget network" fix -- just resetting all network settings in Android?
Yeah I was really hoping the replacement SIM would fix it but sadly it was a dead end.
I have tried several messengers like the stock Lineage one, Google Messenger, and landed on Textra because it has the most configuration options.
Yeah I tried Odining modems from both the link you referenced and extracting them myself from the firmware. Not sure if this is essentially the same thing as overwriting the modems in the corrupted TWRP modem guide. I am tempted to try this over the weekend after making an EFS backup. Hard for me to believe that deleting modemst1 partitions and not restoring them afterwards as is what seems to be the fix... Does the system automatically rebuild them or something?

Fear_The_Fluff said:
No issues with my S5, but I later remembered this post:
https://forum.xda-developers.com/galaxy-s5/help/solved-unknown-baseband-fixed-t3680402
Try it, I know it was a huge problem awhile back, maybe this will help you.
Click to expand...
Click to collapse
So I decided to bite the bullet and run the dd if=/dev/zero of=/dev/block/bootdevice/by-name/modemst1 and 2 in TWRP terminal and got the "No space left on device" in the output (tried over ADB with the same result). Supposedly this isn't necessarily a bad thing as evidenced https://forum.xda-developers.com/showpost.php?p=68532486&postcount=115. Had no problems on stock after doing this (but had no problems on stock prior either).
Then I switched back to AOSP Extended 5.8 (Oreo) and sadly I got the Roaming Indicator Off right away. I tried zeroing out the modemst's again with the same No Space result and back in Oreo got the same delayed texts and Roaming Indicator Off after a few minutes. Dead end, but at least I tried I guess. I am back on stock and my only other thought is to unlock some LTE bands but that may be too technical for me to bother with. Stock works with the current bands so I wonder why I should have to do that on Lineaage.

drewcu said:
So I decided to bite the bullet and run the dd if=/dev/zero of=/dev/block/bootdevice/by-name/modemst1 and 2 in TWRP terminal and got the "No space left on device" in the output (tried over ADB with the same result). Supposedly this isn't necessarily a bad thing as evidenced https://forum.xda-developers.com/showpost.php?p=68532486&postcount=115. Had no problems on stock after doing this (but had no problems on stock prior either).
Then I switched back to AOSP Extended 5.8 (Oreo) and sadly I got the Roaming Indicator Off right away. I tried zeroing out the modemst's again with the same No Space result and back in Oreo got the same delayed texts and Roaming Indicator Off after a few minutes. Dead end, but at least I tried I guess. I am back on stock and my only other thought is to unlock some LTE bands but that may be too technical for me to bother with. Stock works with the current bands so I wonder why I should have to do that on Lineaage.
Click to expand...
Click to collapse
This bug has been around for awhile and affects all S5s differently and at different times. There are still S5s that work great, who knows if they will ever gets this bug. You may want go to the Lineage post on XDA to see if they maybe able to help you. Maybe something has changed since I gave up on my S5. Good Luck!

Fear_The_Fluff said:
This bug has been around for awhile and affects all S5s differently and at different times. There are still S5s that work great, who knows if they will ever gets this bug. You may want go to the Lineage post on XDA to see if they maybe able to help you. Maybe something has changed since I gave up on my S5. Good Luck!
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Can you do me one more favor and tell me if your CID is 1501004d414732474300bd6d97165100 (think we all have the same)? Not sure if my problem relates to the way my S5 was unlocked as I originally used one of the early unlock methods (wipe the SD) from https://forum.xda-developers.com/ve...t/rd-unlocking-galaxys-s5-bootloader-t3337909. Thanks!

drewcu said:
Can you do me one more favor and tell me if your CID is 1501004d414732474300bd6d97165100? Not sure if my problem relates to the way my S5 was unlocked as I originally used one of the early unlock methods (wipe the SD) from https://forum.xda-developers.com/ve...t/rd-unlocking-galaxys-s5-bootloader-t3337909. Thanks!
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Click to collapse
My Verizon S5 (this is the working phone) is a CID 15 (I don't have the phone with me right now to get the CID ID), I can look around for the setup I used. It was some months ago when I ran the bootloader unlock and root. BUT! the phone I had an issue with the LTE was a sprint S5 that was unlocked for years before they started locking the bootloaders. This bug affects all carriers, but mostly sprint and verizon.

drewcu said:
Can you do me one more favor and tell me if your CID is 1501004d414732474300bd6d97165100 (think we all have the same)? Not sure if my problem relates to the way my S5 was unlocked as I originally used one of the early unlock methods (wipe the SD) from https://forum.xda-developers.com/ve...t/rd-unlocking-galaxys-s5-bootloader-t3337909. Thanks!
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Click to collapse
Here is the root I used: https://forum.xda-developers.com/ve.../testers-required-easier-root-method-t3561529

Fear_The_Fluff said:
Here is the root I used: https://forum.xda-developers.com/ve.../testers-required-easier-root-method-t3561529
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Click to collapse
Thanks yeah that's the more recent method and I am just trying to figure out if that results in the same CID I have. If not, there may be some issue because I am using the same CID as others. But perhaps we all are using the same CID and then I can cross that theory off my long list haha. When you get a chance, can you please check the CID of the Verizon S5 you have?
Thanks!

drewcu said:
Thanks yeah that's the more recent method and I am just trying to figure out if that results in the same CID I have. If not, there may be some issue because I am using the same CID as others. But perhaps we all are using the same CID and then I can cross that theory off my long list haha. When you get a chance, can you please check the CID of the Verizon S5 you have?
Thanks!
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Click to collapse
The CID doesn't change, its just the Chip ID of the phone. You either have the CID 11, which you wouldn't be able to unlock the boot loader let alone put lineage on it. Then there's the CID 15 which does let you unlock the boot loader. I never used the CID checker I ended up finding out if I had a 15 by going to this forum: https://forum.xda-developers.com/verizon-galaxy-s5/help/to-id-cid-15-loading-app-t3756413
Now, with that being said, could there be some sort of correlation between a CID 15 with a specific version number and the bug? Its possible, I could have a different CID 15 version than you and that one may not be affected. Who knows

Fear_The_Fluff said:
The CID doesn't change, its just the Chip ID of the phone. You either have the CID 11, which you wouldn't be able to unlock the boot loader let alone put lineage on it. Then there's the CID 15 which does let you unlock the boot loader. I never used the CID checker I ended up finding out if I had a 15 by going to this forum: https://forum.xda-developers.com/verizon-galaxy-s5/help/to-id-cid-15-loading-app-t3756413
Now, with that being said, could there be some sort of correlation between a CID 15 with a specific version number and the bug? Its possible, I could have a different CID 15 version than you and that one may not be affected. Who knows
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Click to collapse
Pretty sure this whole unlocking the bootloader on CID 15 requires that you change your CID to match the Developer CID. I know that my current CID is referenced in the thread https://forum.xda-developers.com/ve...locking-galaxys-s5-bootloader-t3337909/page39 back when this was all just coming out (and when I first unlocked it using the old method 4 - https://forum.xda-developers.com/ve...t/rd-unlocking-galaxys-s5-bootloader-t3337909). I used to have a different CID that's saved somewhere else.
Any chance you can look your CID to see if it matches 1501004d414732474300bd6d97165100?
Thanks!