Database Users

[Q] Bootloader unlock for SGH-I337Z AIO WIRELESS

Hello all. I am new to this site but I enjoy it a lot and I learned a lot as well from the threads. I got AIO wireless service that has the I337 model galaxy s4. I successfully rooted my phone with Kingo root. After rooting my phone I tried to install a customer recovery on it with no success no matter what I did ( I tried every imaginable scenario). In the process of rooting my phone my kernel got damaged and my Wi-Fi stopped working. I am trying to re flash the phone with custom multi carrier rom but I think that my boot loader is locked and that is the reason I can’t install the recovery. If anyone can guide me in the right direction where I can unlock the boot loader would be amazing. Thank you all in advance

1. This section isn't for AIO wireless but I don't know if there is a section for it.
2. There is currently no way to unlock the boot loader.
3. If you want to restore it back to stock read about it in my signature.
Sent from my SAMSUNG-SGH-I337 using Tapatalk

4tele said:
Hello all. I am new to this site but I enjoy it a lot and I learned a lot as well from the threads. I got AIO wireless service that has the I337 model galaxy s4. I successfully rooted my phone with Kingo root. After rooting my phone I tried to install a customer recovery on it with no success no matter what I did ( I tried every imaginable scenario). In the process of rooting my phone my kernel got damaged and my Wi-Fi stopped working. I am trying to re flash the phone with custom multi carrier rom but I think that my boot loader is locked and that is the reason I can’t install the recovery. If anyone can guide me in the right direction where I can unlock the boot loader would be amazing. Thank you all in advance
Click to expand...
Click to collapse
seedeh said:
1. This section isn't for AIO wireless but I don't know if there is a section for it.
2. There is currently no way to unlock the boot loader.
3. If you want to restore it back to stock read about it in my signature.
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Click to expand...
Click to collapse
This section is for all I337 variants. He has a different model than the AT&T I337, so that restore tar in your signature won't work and the bootloader may be unlocked for him depending on his carrier's choice.
EDIT: Here is the I337Z stock firmware. http://forum.xda-developers.com/showthread.php?t=2448794
It says they did not get a recovery working, you may be stuck to Safestrap 3.65

DeadlySin9 said:
This section is for all I337 variants. He has a different model than the AT&T I337, so that restore tar in your signature won't work and the bootloader may be unlocked for him depending on his carrier's choice.
EDIT: Here is the I337Z stock firmware. http://forum.xda-developers.com/showthread.php?t=2448794
It says they did not get a recovery working, you may be stuck to Safestrap 3.65
Click to expand...
Click to collapse
Ah. He said I337Z in the title but not the post so I was confused.
Sent from my SAMSUNG-SGH-I337 using Tapatalk

Thank you
I guess I need to do some more reading about safe strap...If you could point me in the right direction..it would be good...:good:

My phone is i337z
I Typed my mistake i337 in the body of the message.

Got my Phone to work with safestrap
Thank you again! I got my phone to work with safe strap 3.65! I loaded the Intika Locky S4 Rom v1.0 everything seems to work :good:

4tele said:
Thank you again! I got my phone to work with safe strap 3.65! I loaded the Intika Locky S4 Rom v1.0 everything seems to work :good:
Click to expand...
Click to collapse
4tele, I assume you used the AT&T Safestrap? I was not able to get AT&T Safestrap 3.65, 3.71, or 3.72 to work on my I337Z from Cricket (AIO) with KitKat 4.4.2, build number KOT49H.I337ZTUUBNE2. The app says it installed successfully, but it never seems to activate. Are you on KitKat? If so, what build number?
Anyone know if it's possible to flash the AT&T I337 MF3 firmware on the I337Z then try to unlock the bootloader using the process described below? http://forum.xda-developers.com/showthread.php?t=2387577

I used the AT&T safestap 3.65 but my phone was on MH1 firmware 4.2.2 and it worked, if you are on kitkat probably need to use the latest safestap I guess

guys check this out , maybe one developer decides to take advantage of this and help us out http://www.droid-life.com/2014/08/07/moto-x-bootloader-unlock-qualcomm/

[Q] Rooting S4 (Build No. NC1)

I am new to flashing so sorry if I have asked some stupid questions.
I have SGH-I337 (ATT) and would like to root and then maybe install Cyanogenmod or any other custom ROM.
Device Details:
Baseband - NC1
Build No. - NC1
Android Version - 4.4.2
I tried to root NC1 directly using motochopper. Then I read and I am now trying to downgrade.
I have got ODIN 3.09 but it does not say support to I337. I have gone through Noob Helper
I have downloaded all zips from Downgrade
After reading the article of Modems; I got confused about my bootloader.
I also have gone through the thread but after that confusion, I did not proceed ahead.
Could anyone please help me?
How to identify boot-loader?
Which ODIN to use or do I need to use SAFETRAP (not sure if bootloader is MF3) ?

mayurd said:
I am new to flashing so sorry if I have asked some stupid questions.
I have SGH-I337 (ATT) and would like to root and then maybe install Cyanogenmod or any other custom ROM.
Device Details:
Baseband - NC1
Build No. - NC1
Android Version - 4.4.2
I tried to root NC1 directly using motochopper. Then I read and I am now trying to downgrade.
I have got ODIN 3.09 but it does not say support to I337. I have gone through Noob Helper
I have downloaded all zips from Downgrade
After reading the article of Modems; I got confused about my bootloader.
I also have gone through the thread but after that confusion, I did not proceed ahead.
Could anyone please help me?
How to identify boot-loader?
Which ODIN to use or do I need to use SAFETRAP (not sure if bootloader is MF3) ?
Click to expand...
Click to collapse
Dont worry about Odin saying the device is i9505 or so. The flash will work.
For samsung phones running full stock firmware, all the components have the same version. Since your build is NC1, your bootloader is also NC1.
You are in the right track. Follow the downgrade thread to partial downgrade to MK2. Then use saferoot to root. Then install safestrap v3.72. Then use the deadly venom kitkat magic tool to install any kitkat rom of your choice from this list (post 3).
You cannot install any AOSP based rom. So, no CM. Even google play edition roms dont work.
You can install AOSP themed roms (like BlackBox3.0)

jmjoyas said:
Dont worry about Odin saying the device is i9505 or so. The flash will work.
For samsung phones running full stock firmware, all the components have the same version. Since your build is NC1, your bootloader is also NC1.
You are in the right track. Follow the downgrade thread to partial downgrade to MK2. Then use saferoot to root. Then install safestrap v3.72. Then use the deadly venom kitkat magic tool to install any kitkat rom of your choice from this list (post 3).
You cannot install any AOSP based rom. So, no CM. Even google play edition roms dont work.
You can install AOSP themed roms (like BlackBox3.0)
Click to expand...
Click to collapse
Thank you for the response. I have downgraded to MK2 and have done the root.
I was wondering if you could tell me if it is possible to install Liquid Smooth ROM. I have seen the video and I have downloaded from here which says S4 unified. Also, there are some videos claiming CM on S4.
Could anyone please help on the same?

mayurd said:
Thank you for the response. I have downgraded to MK2 and have done the root.
I was wondering if you could tell me if it is possible to install Liquid Smooth ROM. I have seen the video and I have downloaded from here which says S4 unified. Also, there are some videos claiming CM on S4.
Could anyone please help on the same?
Click to expand...
Click to collapse
As already stated, no AOSP based roms will work (ROMs that are built by compiling AOSP code). Only TouchWiz based roms will work. If you need AOSP look and feel, you can install an AOSP themed rom.
CM/AOSP on ATT S4 is only possible if you have the MDB/MDL bootloader. Anything above that, it wont work.

jmjoyas said:
As already stated, no AOSP based roms will work (ROMs that are built by compiling AOSP code). Only TouchWiz based roms will work. If you need AOSP look and feel, you can install an AOSP themed rom.
CM/AOSP on ATT S4 is only possible if you have the MDB/MDL bootloader. Anything above that, it wont work.
Click to expand...
Click to collapse
Sorry for the repeated questions.
I tried to update through Safestrap with BlackBox. But I got stuck on the boot screen where it shows Samsung Logo. I might have done something wrong. I just clicked next on BlackBox 3.0. Could anyone please help me !
Edit:
When I tried to reboot into recovery mood (Vol Up + Home + Power) it says:
" Secure Fail Kernel
(Warning Sign) System Software not authorised by ATT has been found on your phone"

Don't select the reboot now option in the aroma installer at the end. Then, after the ROM flash is complete and before you reboot the phone, you need to put the phone back in download mode and flash the MLD ap/bl/cp files from the tool
Sent from my GT-I9505 using Tapatalk

jmjoyas said:
Don't select the reboot now option in the aroma installer at the end. Then, after the ROM flash is complete and before you reboot the phone, you need to put the phone back in download mode and flash the MLD ap/bl/cp files from the tool
Sent from my GT-I9505 using Tapatalk
Click to expand...
Click to collapse
I flashed the NB1 using ODIN but it still stays on Samsung Logo with custom logo. I am not able to navigate any where else from that screen.
Edit:
I was able to go into system recovery. Please let me know if I can fix the error somehow.
Thanks a lot !

Get into stock recovery and factory reset. I am not sure why you flashed NB1 though, as there is no direct root method for it yet
Sent from my GT-I9505 using Tapatalk

jmjoyas said:
Get into stock recovery and factory reset. I am not sure why you flashed NB1 though, as there is no direct root method for it yet
Sent from my GT-I9505 using Tapatalk
Click to expand...
Click to collapse
He probably was following the steps that were provided elsewhere here that had you go from nc1 to nb1 then back to the M (I can't remember which M) one.

jmjoyas said:
Get into stock recovery and factory reset. I am not sure why you flashed NB1 though, as there is no direct root method for it yet
Sent from my GT-I9505 using Tapatalk
Click to expand...
Click to collapse
I had rooted MK2 and the installed the custom ROM (Blackbox) and then was suppose to flash NB1.
So, if I just did a factory reset it would solve my error?
Thanks for the help!
Edit:
I tried doing the factory reset. It just wipes all the user data. And I am still stuck on the same screen with Samsung and the custom logo.

mayurd said:
I had rooted MK2 and the installed the custom ROM (Blackbox) and then was suppose to flash NB1.
So, if I just did a factory reset it would solve my error?
Thanks for the help!
Edit:
I tried doing the factory reset. It just wipes all the user data. And I am still stuck on the same screen with Samsung and the custom logo.
Click to expand...
Click to collapse
I have sent you a PM. Probably I can assist better on hangout.

OTA update with no recovery

so i have an s4 that had 4.3...well it has an unlocked bootloader and recently i lost the stock recovery and no custom recovery was on there. so did the 4.4 ota update like a genius and now the phone is stuck in odin download mode. cant get it to boot cant get anywhere. im in the process of downloading the stock 4.4 firmware and i downloaded a custom rom and custom recovery. i didnt know where to go from here. would it be ok to flash the stock firmware with odin? or could i just try a custom recovery and custom rom in odin?? looking for some serious help. thanks in advanced

Do you have an i337, because if you do the bootloader is not unlocked. You're going to have to flash the stock firmware in Odin
Sent from my Nexus 5 using XDA Free mobile app

jd1639 said:
Do you have an i337, because if you do the bootloader is not unlocked. You're going to have to flash the stock firmware in Odin
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
it is an i337. when i turn it on i get the unlocked lock with the samsung logo. i thought that was the bootloader.. im going totry to flash stock with odin now.

so that worked.. its booting up now. just to be certain i cannot flash custom recovery in odin on this right? and ill worry about the sim error at a later time.. already replaced the part yet i still get an error

The only working recovery for your phone now is safestrap
Sent from my GT-I9505 using Tapatalk

tadcrazio said:
so that worked.. its booting up now. just to be certain i cannot flash custom recovery in odin on this right? and ill worry about the sim error at a later time.. already replaced the part yet i still get an error
Click to expand...
Click to collapse
You're screwing up because you haven't read about the things you are trying to do. If you want to learn and do things correctly, I suggest reading the pinned threads in the general and q&a sections paying close attention to the information that is specifically about your model and firmware version. The things you are trying to do and the questions you are asking have been answered many times over in those threads.

tadcrazio said:
so i have an s4 that had 4.3...well it has an unlocked bootloader and recently i lost the stock recovery and no custom recovery was on there. so did the 4.4 ota update like a genius and now the phone is stuck in odin download mode. cant get it to boot cant get anywhere. im in the process of downloading the stock 4.4 firmware and i downloaded a custom rom and custom recovery. i didnt know where to go from here. would it be ok to flash the stock firmware with odin? or could i just try a custom recovery and custom rom in odin?? looking for some serious help. thanks in advanced
Click to expand...
Click to collapse
I went through the same situation and previous post is the right suggestion go to the pin general.
This is what I did
http://forum.xda-developers.com/showthread.php?p=52289782
You need to flash full nb1 to regain stock.
Once you are in nb1 you can choose to stay stock or downgrade to mk2 to root and install safestrap.
From there you can install any Tw rom not AOSP YOU CAN NOT FLASH CUSTOM ROMS.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

[Q] Bootloader unlock Galaxy s4 sgh-i337 4.4.2 kitkat

I rooted my galaxy s4 sgh-i337 runing android 4.4.2 today using towel root. It is an apk you install and will root any phone with 4.4.2 or lower. Well I tried flashing clockworkmod but when it restarts a message from at&t comes up saying that unauthorize software is trying to install on phone. So I think that means the bootloader is locked. How do I unlock it so I can flash CWM and perform a nandroid backup. Then I want to install custom roms. I know alot of people were looking for 4.4.2 root for s4 so might want to post another thread about towel root. towelroot .com

patstar5 said:
I rooted my galaxy s4 sgh-i337 runing android 4.4.2 today using towel root. It is an apk you install and will root any phone with 4.4.2 or lower. Well I tried flashing clockworkmod but when it restarts a message from at&t comes up saying that unauthorize software is trying to install on phone. So I think that means the bootloader is locked. How do I unlock it so I can flash CWM and perform a nandroid backup. Then I want to install custom roms. I know alot of people were looking for 4.4.2 root for s4 so might want to post another thread about towel root. towelroot .com
Click to expand...
Click to collapse
You CANNOT install CWM or TWRP. You will need to use SafeStrap recovery. Read up about it, as I have the older Loki bypass and don't need/use towelroot or safestrap.
With safestrap you are limited to flashing Touchwiz based roms. You can flash modems. You CANNOT flash kernels.
Sent From My Spiderman,Ironman,Red,Dark Blue,Green, GreyedOut BadAss Themed I337

RockRatt said:
You CANNOT install CWM or TWRP. You will need to use SafeStrap recovery. Read up about it, as I have the older Loki bypass and don't need/use towelroot or safestrap.
With safestrap you are limited to flashing Touchwiz based roms. You can flash modems. You CANNOT flash kernels.
Sent From My Spiderman,Ironman,Red,Dark Blue,Green, GreyedOut BadAss Themed I337
Click to expand...
Click to collapse
So I can't use cyanogenmod, aosp, aopk, or pacman roms?

patstar5 said:
So I can't use cyanogenmod, aosp, aopk, or pacman roms?
Click to expand...
Click to collapse
There's one partially working Google Play edition rom, but otherwise, no.

This makes me truly sad. I was so looking forward to possibly flashing these ROMS and now...I have to get it my time machine and go backwards lol whenever I find the time to figure the downgrading thing out. Sounds to me like I'll be happier when I do find the time.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

There is no way going back to the older bootloader. The only way to go back would be to find an older S4 on eBay etc. with the old BL
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

patstar5 said:
I rooted my galaxy s4 sgh-i337 runing android 4.4.2 today using towel root. It is an apk you install and will root any phone with 4.4.2 or lower. Well I tried flashing clockworkmod but when it restarts a message from at&t comes up saying that unauthorize software is trying to install on phone. So I think that means the bootloader is locked. How do I unlock it so I can flash CWM and perform a nandroid backup. Then I want to install custom roms. I know alot of people were looking for 4.4.2 root for s4 so might want to post another thread about towel root. towelroot .com
Click to expand...
Click to collapse
All the post below are correct except being able to go back to firmware with an unlocked boot loader.. Install safestrap 3.72 and install recovery. You will get a Twrp recovery .. dont try flashing custom kernels ..It might flash but none of the setting such as overclock etc. will work .nor will you be on that kernel version afterwrds .. I guess the simple answer is no for cwm and aosp roms .. You will be only able too flash custom stock roms

Wifi issues with towelrooted gs4
First off this may not be the right place for this (first time poster), and if so, either please help me in finding the right forum or forgive my ignorance.
I rooted my galaxy s4 today, and I have found that when I am trying to use wifi I am unable to connect to some pages. Using chrome I am unable to load google.com, or google anything directly from the search bar. And the app imgur also doesn't load whilst on wifi, but if I switch to my cell network they load just fine. If I had unlimited data of course this would not be an issue, but that is not the case and therefore I come to this forum and hope that someone can help me out!
My s4 is an at&t i337. I would amazingly, greatly appreciate any help!
Much thanks in advance!

lost recovery with unlocked bootloader
Hello,
longtime flasher here, not as familiar with gs4.
My girl has a sgh-i337 that has been bootloader unlocked since day one. Been on TWRP and slim rom the whole time too.
I was wiping Cache, Dalvik Cache, and System prior to doing a rom update and TWRP glitched out while updating partition after the final wipe operation. Screen went black. Boots to download mode only.Will not boot rom (as system was wiped) but shows the samsung custom unlocked logo. When in download (odin) mode, I see product name: sgh-1337, Current Binary: Samsung Official, System Status: Custom CSB_OEM_LSB: 0x30 Write Protection: enable
universal android toolkit will not show device connected so Installation of custom recovery through toolkit fails. ADB will not show device connected. ODIN will show device connected, though.
To recover with odin, can I flash the I337UCUAMDL from sammobile and retain unlocked bootloader?
Thanks for any and all help.

What is the bootloader version you need to unlock? I have 4.2.2 Red ATT S4, Baseband Version : I337UCUAMF3 / BUILD: JDQ39 , if i was able to unlock how would i go about doing so? I was hoping i could do something with Loki if not? How does Loki work exactly as well?

Congrats, you just voided your warranty. It will be 0x1 instead of 0x0.
Sent from my SAMSUNG-SGH-I337 using XDA Free mobile app

Just FYI for you guys hijacking the thread. It is usually better for you if you start your own thread. Most people skim these threads and may lose track of who they were helping or give bad info to you thinking they were replying to the original question. Or, just skip the thread if they don't think the OP tiltle interests them.
You will get more direct answers and quicker help if you do. Or try to post here--
http://forum.xda-developers.com/showthread.php?t=2320430
Just trying to get you faster and more accurate responses--:good:

How did you root S4?
patstar5 said:
I rooted my galaxy s4 sgh-i337 runing android 4.4.2 today using towel root. It is an apk you install and will root any phone with 4.4.2 or lower. Well I tried flashing clockworkmod but when it restarts a message from at&t comes up saying that unauthorize software is trying to install on phone. So I think that means the bootloader is locked. How do I unlock it so I can flash CWM and perform a nandroid backup. Then I want to install custom roms. I know alot of people were looking for 4.4.2 root for s4 so might want to post another thread about towel root. towelroot .com
Click to expand...
Click to collapse
How did you root your galaxy? I've been trying for two days now and no matter what I try to do it never works, fortunately I haven't bricked my phone but I feel like it's only a matter of time! I have a:
Samsung SGH-I337 for AT&T
4.4.2
Baseband Version: I337UCUFNI1
Kernel version: 3.4.0 Sep. 4th
Security software version v1.0 Release 2

th3doorMATT said:
How did you root your galaxy? I've been trying for two days now and no matter what I try to do it never works, fortunately I haven't bricked my phone but I feel like it's only a matter of time! I have a:
Samsung SGH-I337 for AT&T
4.4.2
Baseband Version: I337UCUFNI1
Kernel version: 3.4.0 Sep. 4th
Security software version v1.0 Release 2
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?p=55537351
Sent from my Nexus 5 using XDA Free mobile app

Using Odin 3.10
jd1639 said:
http://forum.xda-developers.com/showthread.php?p=55537351
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
I've tried using other methods I'm not home to try this one out but every time I've connected my phone to Odin the COM Port has always been blue, I've never gotten it to be yellow like I've read in other guides. Any time I've tried to flash when it's blue it's failed. Any suggestions to get it yellow?

th3doorMATT said:
I've tried using other methods I'm not home to try this one out but every time I've connected my phone to Odin the COM Port has always been blue, I've never gotten it to be yellow like I've read in other guides. Any time I've tried to flash when it's blue it's failed. Any suggestions to get it yellow?
Click to expand...
Click to collapse
I believe in Odin 3.09 it is blue I've always used 1.85 where it's yellow. What tar file are you trying to flash?
Sent from my SAMSUNG-SGH-I957 using XDA Free mobile app

jd1639 said:
I believe in Odin 3.09 it is blue I've always used 1.85 where it's yellow. What tar file are you trying to flash?
Sent from my SAMSUNG-SGH-I957 using XDA Free mobile app
Click to expand...
Click to collapse
Hmmm. I still don't know why it fails but when I get home I'll have to let you know. I've deleted several after failing. I'm sure I can find them again and I think I still have a few as well so I'll let you know.

CF Auto Root and Towelroot
jd1639 said:
I believe in Odin 3.09 it is blue I've always used 1.85 where it's yellow. What tar file are you trying to flash?
Sent from my SAMSUNG-SGH-I957 using XDA Free mobile app
Click to expand...
Click to collapse
I've used both CF Auto Root, Towelroot, and Motochopper guides and none of them have worked.
The only file I have on my computer is: philz_touch_6.08.9-jflteatt.tar.md5 as one of the files I used but that didn't work. I actually had already downloaded the files from the article you had linked but I didn't get around to it yet, I'm going to try that method out in about 15-30mins and see what happens.

It worked!
jd1639 said:
http://forum.xda-developers.com/showthread.php?p=55537351
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
Followed everything on that post and it worked! I'm rooted!
Though I'm not sure if you know about custom recoveries. I'm having issues with installing any of them and having it work. I am currently trying Safestrap and for some reason it won't install the recovery. It'll go through the process, but the state of the recovery won't change or anything.
I ultimately want to install CM11, but I'm really struggling to find a way that works!

unlocked bootloader.....
patstar5 said:
I rooted my galaxy s4 sgh-i337 runing android 4.4.2 today using towel root. It is an apk you install and will root any phone with 4.4.2 or lower. Well I tried flashing clockworkmod but when it restarts a message from at&t comes up saying that unauthorize software is trying to install on phone. So I think that means the bootloader is locked. How do I unlock it so I can flash CWM and perform a nandroid backup. Then I want to install custom roms. I know alot of people were looking for 4.4.2 root for s4 so might want to post another thread about towel root. towelroot .com
Click to expand...
Click to collapse
I still can't figure how to install the .apk file from kingroot..? How do you install the file to root it..?

Help sought: Screwed up my S4 and seeking a fix

Note: Relevant device info will be provided below.
Dear techwizards,
I've been trying to root my phone for a while, I've done it before: both my S II and S III were international variants, and rooting those devices was very simple. But after getting an S IV from America and consensually downloading a samsung issued update -- I had yet to read up on the disadvantages of knox -- my rooting and android experience took a turn for the worse.
Long story short -- I know developers are a proud bunch who value their time -- I tried rooting my phone yesterday after almost smashing my phone on a coffee table. They say it's a well known side effect of Touchwiz, but I'll leave that to you.
I used a towelroot.com root -- a wonderful tool, if I may say so. After that, I visited the CM website and picked out the compatible CM11. I never got to flashing it though, as my problems arose while installing a recovery.
I had downloaded an app, a something recovery or another. They had an option to flash recoveries on there--it would download your recovery for you and do all the work, which seemed plausible as most video tutorials demonstrated. To my astonishment, doing so bricked my phone.
I tracked back, looked for the samsung stock rom, downloaded all 2.2 gb's of it and flashed it. It worked. My phone was functional but I suspect something within it stinks. My device, apparently for security reasons, wont let my wifi or 4g to establish a connection. It's making it impossible for me to fix this problem as I can't root my device or flash a custom rom.
About Device:
Pre problem I was running a:
SGH-I337UCUFNC1 baseband. Build Number ending with: NC1.
Android version: 4.2.2
Post problem:
Baseband: I337UCUFNC1
Build Number: JSS15J.I337UCUEMK2
Android version 4.3.
If I could find my original stock 4.2.2 NC1 version and get simple instructions on how to re-install it back to stock version, I'd be very grateful.
If you know how I could fix the internet issue on the MK2 one, and provide some simple instructions of how to root it, I'd be grateful too.
If you think neither would work, and have something else in mind, Im open to your suggestions.
Much Regards,
Y

You can only use safestrap for the recovery. See in the general forum index, all things at&t....
You can't flash cm, only touch wiz based roms
Sent from my Nexus 5 using XDA Free mobile app

jd1639 said:
You can only use safestrap for the recovery. See in the general forum index, all things at&t....
You can't flash cm, only touch wiz based roms
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
I never got to installing or attempting to install CM.
Things took a turn for the unexpected after I tried installing CMW recovery.
Please reread my post

I've read it. You can't install cwm. That's what had messed up your device. The only recovery you can use is safestrap
Sent from my SAMSUNG-SGH-I957 using XDA Free mobile app

jd1639 said:
I've read it. You can't install cwm. That's what had messed up your device. The only recovery you can use is safestrap
Sent from my SAMSUNG-SGH-I957 using XDA Free mobile app
Click to expand...
Click to collapse
I see. Thanks for the info. Do you know what could be done to restore my device to stock? As of now I'm running a MK2 Android 4.3 on a NC1 4.2.2 device and the wifi/4g connection aren't working.

androidshmandroid said:
I see. Thanks for the info. Do you know what could be done to restore my device to stock? As of now I'm running a MK2 Android 4.3 on a NC1 4.2.2 device and the wifi/4g connection aren't working.
Click to expand...
Click to collapse
Did you look for the thread I pointed you to? In the general forum index, all things at&t... You're going to want to start there. That'll link you to this
http://forum.xda-developers.com/showthread.php?p=49687770
Sent from my SAMSUNG-SGH-I957 using XDA Free mobile app

Since your bootloader is already locked, you might as well Odin to stock. Odin to NB1 then use stock recovery to flash the NC1 update from a zip file on a microSD.
Part of the problem is that the NC1 is not 4.2.2 like you listed, but 4.4.2. That's the update you applied that started the sordid tale. When you were on 4.2.2, with bootloader MD<something>, you could have flashed CM or whatever, because you would be able to have TWRP or CWM recovery. When Samsung pushed out a 4.3 update (MK2 I believe) all the unlocked bootloader fun was over, probably permanently for this phone.
When you flashed MK2 firmware (4.3) onto the phone, parts of it don't work with the NC1 baseband, causing the problems you've seen. If you Odin NB1, then do the quick zip update from stock recovery to get all the way to NC1, you'll be back to stock and everything should work.
Once that's done, you can go through this process:
1. Root with Towelroot.
2. Install SuperSU to manage root access. (You might have to reboot, it's a 50%/50% shot... sometimes it hangs trying to disable Knox... no worries just reboot)
3. Install SafeStrap... it will create the safestrap recovery. You might need to install SELinux Mode Changer app (from play store) and set to permissive, to get Safestrap installed.
4. Boot to the SafeStrap recovery. Install any touchwiz rom. Only touchwiz compatible roms will work. I liked GoldenEye.
When installing touchwiz ROMs, typically one flashes the ROM, then SuperSU, then the NC1 modules, then the ATT BuildProp/APN file. Sounds complex but goes quickly. Some roms have some of these things built in.
Good luck! I eventually decided I didn't like the ATT Samsung restrictions of the locked boot loader, and bought a T-Mobile M919 variant of the S4. Unlocked boot loader. Woo hoo. And works fine on ATT.
Marc