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[Completed] Samsung Galaxy S3 T999 Flash/ROM Help!

First off, I have been feeling like a complete NOOB the past 2 days so I wanted to make a post asking for help. Thank you in advanced!
I am using a T-mobile Samsung S3 T999, and for over a year I was running one variant of the Infamous S3 ROM. Unfortunately, a couple days ago, I noticed that my cell service would only be turned on for a split second during start up. I attributed this to software issues, especially since I haven't flashed a ROM in over 1 year.
I decided to try to flash the available Infamous Lite ROM (http://forum.xda-developers.com/showthread.php?t=2172437)
This surprisingly worked fine, but I noticed that my camera wasn't working. Since then, I have flashed a plethora of other ROMS, but none have the camera working. Additionally, only the infamous ROM allowed me to get LTE service, all other ROMs did not. I tried inputting the APN on some ROMs but that didn't work.
Stupidly, I flashed UVUEMJ4 onto my phone, and now I have lost service completely, and the camera doesn't work still.
Am I not flashing my phone right? It seems like I have information being carried over from each flash or something. I reflashed to the semi-stable infamous lite for S3, and now I don't have service, and it says for me to insert SIM card. Is it actually possible to burn out my SIM card (its brand new, I picked up a new one when I initially lost service). Can I undo the UVUEMJ4 flash? Is there a more current modem thingy I should be using?
All in all, I am pretty lost, and don't have a phone with service nor camera (I love instagram hehe). Can anyone please help!?
PS I was worried that I shouldn't completely wipe my phone (ie TWRP) since I have a mac and I wasn't sure if its completely compatible to save my phone. I also destroyed my external SD card in this process (waiting on a new one).

XDA Visitor said:
First off, I have been feeling like a complete NOOB the past 2 days so I wanted to make a post asking for help. Thank you in advanced!
I am using a T-mobile Samsung S3 T999, and for over a year I was running one variant of the Infamous S3 ROM. Unfortunately, a couple days ago, I noticed that my cell service would only be turned on for a split second during start up. I attributed this to software issues, especially since I haven't flashed a ROM in over 1 year.
I decided to try to flash the available Infamous Lite ROM (http://forum.xda-developers.com/showthread.php?t=2172437)
This surprisingly worked fine, but I noticed that my camera wasn't working. Since then, I have flashed a plethora of other ROMS, but none have the camera working. Additionally, only the infamous ROM allowed me to get LTE service, all other ROMs did not. I tried inputting the APN on some ROMs but that didn't work.
Stupidly, I flashed UVUEMJ4 onto my phone, and now I have lost service completely, and the camera doesn't work still.
Am I not flashing my phone right? It seems like I have information being carried over from each flash or something. I reflashed to the semi-stable infamous lite for S3, and now I don't have service, and it says for me to insert SIM card. Is it actually possible to burn out my SIM card (its brand new, I picked up a new one when I initially lost service). Can I undo the UVUEMJ4 flash? Is there a more current modem thingy I should be using?
All in all, I am pretty lost, and don't have a phone with service nor camera (I love instagram hehe). Can anyone please help!?
PS I was worried that I shouldn't completely wipe my phone (ie TWRP) since I have a mac and I wasn't sure if its completely compatible to save my phone. I also destroyed my external SD card in this process (waiting on a new one).
Click to expand...
Click to collapse
Here I found a guide: Beginner's Guide to Rooting, Flashing & Unrooting Your Samsung Galaxy S3 by sandeeppotdar.
And here are some video tutorials: [VIDEO Overviews and How To's] Samsung Galaxy SIII (SGH - T999) by AllAboutAndroids.
Here you find the Frequently Asked Questions by Towle.
And here are some general information about your device: [REF] [GUIDE] Welcome to your device, the Galaxy S III by Exel.
Especially post #2 might be helpful
If you have detailed questions about the ROM you have, please ask in the ROM thread, or the corresponding Q&A thread (if available).
For more general questions about your device, best to ask in the T-Mobile Galaxy S III Q&A, Help & Troubleshooting forum.
You just have to register on xda before.
Good luck !

Thread closed. Thank you!

[Q] No Cellular Data after getting back to stock

Hello everyone,
I was on Lollipop 5.1.1 Stock and not rooted then i decided to give rooting a shot. I downloaded Cataclysm and flashed successfully. everything was fine then i discovered that there is no Cellular Data connection. Rebooted and tried all possible things but didn't work. Finally gave up and flash Cyanogenmod 12. worked perfectly, nothing was wrong and cellular data was fine. After a while i wanted to come back to the clean stock lollipop so i downloaded and flashed Factory Image of Lollipop 5.1.1. Weirdly the Cellular Data doesn't work, i have no idea why or what may cause the problem. Please note that my Nexus 5 is from Amazon Germany. I doubt that there might be something wrong with the radio image ( meant for US models ?!! ) but i don't know really or have no clue what might be causing this !!!!
Any help is appreciated. Thanks in advance

FIXED
After spending 7 hours moving between different ROMs, i found out what was causing the problem of cellular data. The problem also exists after flashing stock image and Cataclysm. I noticed that on CM12 there was one option in the APN settings that was different from stock and Cataclysm. The MVNO type was set to None however in stock and Cataclysm it was IMSI. I don't know how or why would android change or decide that on its own and i also have no idea what does this option do. I guess that this may help many people who are suffering from the same issue ( also people who updated stock ran into same problem )

Don't know where you are but, every time that has happened to me a hands free activation fixed it.
Sent from my Nexus 5 using Tapatalk

Rooting and Custom ROM Problems

So, I'm sure I'm probably doing something incredibly stupid..
I just got my Note 5 today. I've been trying to flash a custom ROM, TEKXodus first and then Dr Ketan's ROM. I managed to get them to boot up (at least Ketans, I've been trying so long today at this point I'm not sure if I ever got TEKXodus to load).
However, after finally getting in, my SIM card isn't being detected, neither is the baseband and IMEI. The phone registers as a N290I instead of N290T.
Did I flash something wrong? Would the wrong version of recovery cause this? Kernels?
This isn't my first time rooting and flashing ROMs, but I can't figure out what I'm doing wrong this time.
Any help would be greatly appreciated.

re: N920T issues
nightfire55 said:
So, I'm sure I'm probably doing something incredibly stupid..
I just got my Note 5 today. I've been trying to flash a custom ROM, TEKXodus first and then Dr Ketan's ROM. I managed to get them to boot up (at least Ketans, I've been trying so long today at this point I'm not sure if I ever got TEKXodus to load).
However, after finally getting in, my SIM card isn't being detected, neither is the baseband and IMEI. The phone registers as a N290I instead of N290T.
Did I flash something wrong? Would the wrong version of recovery cause this? Kernels?
This isn't my first time rooting and flashing ROMs, but I can't figure out what I'm doing wrong this time.
Any help would be greatly appreciated.
Click to expand...
Click to collapse
You need to start from scratch (square one) and odin flash the
official stock Samsung N920T Tmobile Marshmallow 6.0 firmware
before doing anything else.
You can find the N920T Marshmallow 6.0 firmware here:
http://sammobile.com
Good luck,
Have a great day!

The phone came with Marshmallow already installed I believe. Either way I've currently got the stock TMobile installed now and am still having the same problem.

re: phone issues
nightfire55 said:
The phone came with Marshmallow already installed I believe. Either way I've currently got the stock TMobile installed now and am still having the same problem.
Click to expand...
Click to collapse
Perhaps your phone came with the wrong version of Marshmallow 6.0 if the phone was not new when you got it.
Either way I bet you still have NOT Odin flashed the full official stock samsung N920T 6.0 Marshmallow firmware
which can be found at http://sammobile.com
If you finally decide to do the above be sure to do a full wipe and factory data reset before you odin flash.
And forget about roms until you get the phone working properly with the stock N920T odin flash firmware.

Will definitely double check and retry that when I get off of work.

And that worked!
Thank you so much, I was working off a different MM build apparently. Probably would never have figured that out by myself.

T-mobile 4g internet works but I have calling problems

I have the international Note 5, with a t-mobile sim card. When I am on the 4g network and I try to call somebody it takes 20-30 seconds to call. When people call me, they can't reach me. Though the 4g internet works like a charm.
The only way for calling to work is to switch it to 2g, but I am loosing the 4g internet speeds.
I contacted t-mobile, they tried to reset the network, but the problem persists.
Any suggestions?
Would flashing with a custom rom help?
Should I flash the original t-mobile rom?

unce unce unce

I found the problem
The problem has to do with the volte... This option is not available with the n905c model that I have, and there seems not to be a fix with t-mobile. Fricken Samsung didn't put available this feature in the upgrades of some international phones eg the Dubai model that I have...

I have the same problem
I just bought two t-mobile branded Note 5's and I'm using them on Family Mobile (previously owned by tmobile). If I limit my networks to 2G & 3G all of my calling works fine but the moment I enable LTE all of my incoming calls go strait to vm. The problem persists on both phones so I don't think it's a hardware issue. I've tried rooted and unrooted, magisk and supersu. VoLTE is turned off on both phones (since it's not supported by family mobile) but I've tried every combination of settings I can think of and nothing helps. I hate having to choose between having LTE or getting incoming calls and would love to fix the problem. Or is there a good way to totally disable or remove the VoLTE services? If I remember correctly there were similar problems with some of the S4s that required an app like advanced signal status (??? been a while) to overcome. Can anyone help? Please and thank you.

I have the same problem
Hi all,
I have the same problem, even I have install & root with custom rom the problem still exist.
someone told me that the problem is in 3G signal.
so I decide to choose LTE & GSM only, & it works for me. however it could not give 3G signal on my phone.
Did you find the other olution of this?

Evening all, I've been having this same issue, hoping there would be a fix. Not ready to purchase a new phone when there is nothing wrong with the one I have still good for at least another yr(maybe). but not rite now.

i fix the problem
Hi all,
maybe this method could solve the issue. please try it & follow below step.
1. reset to factory setting then after finish please clear Dalvik Cache.
2. Flash with the latest Odin & latest firmware, but you don't need to change everything in options tab. then click start.
3. After finish, then insert APN as mention in this link (please read how to set APN on Galaxy note5)
4. After select your desired APN, please change APN name become ****4g.com (or you can find this apn setting in your carrier SIM (check in google)
5. Finish, please check your phone.
hope above method could solve the issue, however it works for me now.
please try at your own risk & don't forget to always save your data before.

This is the FIX for the Note 5 SM-N920 C, i know this works because i have been dealing with this for MONTHS, so i tried EVERY Custom Roms Untill i figuard WHY NOT flash a Stockish T-Mobile Rom with a Custom Kernel for the 920C. And Just like that i got My Awesome Note 5 BIZACKKK, Here we go, Follow these steps, Upgrade to the FIRST 7.0 that came out for the SM-N920C, of course you should already know to turn on debuging + OEM, Flash TWRP through Odin, then go to the TMOBILE Development Section and THANK "@Marinella" First and foremost for cooking up this Rom, Download his Stockish Unrooted Rom ++7.0 ROM Stock Unrooted N920TUVU4EQE1++you will also need (MAKE SURE TO THANK--->>> ""@AndroidSword"" ) this 7.0 Kernel, go to the seack bar and type it in, FUEL-KERNEL-V2 .... now before anything, Of course do FULL WIPES Of Everything like you usually wipe when downloading other Roms, flash the stockish Rom first, then the Kernel, Just so you know, the Kernel has 2 choices of root. ITS AS SIMPLE AS THAT>>!!!!, Boot your Device and wait, this took me months to figure out after flashing so many diffrent Rom, Now I Have My Favorite International Note 5 Back, trust me , this WILL WORK ON THE 920C. ENJOY...

hi,
above method is for SM-N920C, do you have solution for SM-N920T ?

No Idea, sorry, try different Custom Rom, i have not heard of this issue with the 920T. Good Luck.

[HELP] Baseband doesn't work more

Hi mates, I got the phone from a discount shop, it was flashed with a LL 5.0 version.. after flashing some experiments with unsucessful baseband I 've found the solution. Pit the file and install the latest MM QD1 stock.. then I installed TWRP and flashed ResurrectionRemix 5.8.5 for G900P spr of 29/9/17..
the phone worked correctly since today, then it recognizes the simcard but no netwok signal. Three days ago I updated to the latest RR, which doesn't more report thwe spr version.. they ask use now KLTEDV, I suppose it created the problem.
I wiped all and flash again the stock rom, but no baseband, what can I do?

Barabba11 said:
Hi mates, I got the phone from a discount shop, it was flashed with a LL 5.0 version.. after flashing some experiments with unsucessful baseband I 've found the solution. Pit the file and install the latest MM QD1 stock.. then I installed TWRP and flashed ResurrectionRemix 5.8.5 for G900P spr of 29/9/17..
the phone worked correctly since today, then it recognizes the simcard but no netwok signal. Three days ago I updated to the latest RR, which doesn't more report thwe spr version.. they ask use now KLTEDV, I suppose it created the problem.
I wiped all and flash again the stock rom, but no baseband, what can I do?
Click to expand...
Click to collapse
I had that issue after some months of getting my S5, my modem burned out and they had to replace the device. You may want to see if a repair shop can take a look at it.

Fear_The_Fluff said:
I had that issue after some months of getting my S5, my modem burned out and they had to replace the device. You may want to see if a repair shop can take a look at it.
Click to expand...
Click to collapse
§
thank you for report it! which Android version you had? Did you updated it to a custom rom? Are you sure it was an hardare fault?
I'm asking someone here if it is possibile to check the modem status with some diagnostic code, is it possible?
Thank you

Barabba11 said:
§
thank you for report it! which Android version you had? Did you updated it to a custom rom? Are you sure it was an hardare fault?
I'm asking someone here if it is possibile to check the modem status with some diagnostic code, is it possible?
Thank you
Click to expand...
Click to collapse
I was rooted with either PAC or Cyanogenmod. It started out with a weird issue of my time being off because when I lost signal, the time zone would change. Then my signal strength would weaken or drop all together, normally a reboot would fix it. One day nothing I could do would bring back the signal so I called my provider, they did some troubleshooting (update profile, prl and went in and reset the phone number) send another S5 over to see if that fixed the issue, which it did. I put my old S5 back to stock and it reset knox and I returned the old phone. I think part of that issue may have been that my qi charger may have made the phone too hot and burned it out.

thank you a lot for report it. As soon I have time I'll have a try and report here if I can repair it..

Barabba11 said:
thank you a lot for report it. As soon I have time I'll have a try and report here if I can repair it..
Click to expand...
Click to collapse
Not sure if you ever got your S5 going. I just wanted to let you know that I went back to my S5 as my primary and now I am no longer getting LTE. I will try and troubleshoot the issue at some point, so far I found some posts saying to go back to stock, run all the network updates (PRL, activation, etc) then go back to custom if you have LTE on the stock. They also said to try a new SIM card. I also saw others who had to manually re-add the network settings.

thank you a lot for reply, actually I haven't yet time to work on it.. but I should do it soon somehow.
Anyway my phone is dead about network, no question of LTE. As I know this Spring phones doesn't work on LTE because in US they use other frequencies, and this phone is supposed to work there only

Barabba11 said:
thank you a lot for reply, actually I haven't yet time to work on it.. but I should do it soon somehow.
Anyway my phone is dead about network, no question of LTE. As I know this Spring phones doesn't work on LTE because in US they use other frequencies, and this phone is supposed to work there only
Click to expand...
Click to collapse
UPDATE: I found this on the main S5 site:
https://forum.xda-developers.com/galaxy-s5/help/solved-unknown-baseband-fixed-t3680402
It did not work for me, I think it is because I only have problems with LTE. I think it will work for your problem tho.
Good Luck!

Thank you a lot, I tired but for now doesn't help, I'll try more and waiting support, thank you!