yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S 4 General] klevismartini:
you have to flash this baseband 337m

I337MUMUAMDL i found it around 50mb.

and later the hidden code will work.

or you can download the full stock firmware but i found non working WIFI after flash!!!

I337MUMUAMDJ from sammobile.
[AT&T Samsung Galaxy S 4 General] CanadianChris:
Hello All, i have tried a whole bunch of times to unlock my phone on the rogers network and i can not get to the service menu listed in step 3. the phone is stock. is there something that i need to do before unlocking? or is there a different way that i need to go, i would like to be able to do this for free as it looks easy enough to do.

thanks in advance
[AT&T Samsung Galaxy S 4 General] klevismartini:
i337m unlock for free works for me.

hi, look if you are familiar with odin you can DOWNGRADE THE 337M to this firmware I337MUMUAMDL_I337MTCEAMDL_TCE

that honestly i dont remember when i found it!!!! but i can upload it for you if you want.

after you will flash this stock rom you will lose wifi and speaker but you will be able to unlock it with the 0011 code for free.

after that without wiping anything you must flash the newer rom version found here. TCE-I337MUMUEMK6

samsung - updates . com / device

please remove space

after the 2 flash you will have the 337m unlocked and ready to use thats all i have done to unlock it. :eek:

ps: i try diferent methods but this was the only working. i think:confused:

regards
[AT&T Samsung Galaxy S 4 General] timduncan_xda:
Just curious as I have a i337m from Bell Canada and wondering if flashing these Mexico versions of firmware will affect my phone.

Are you using a Canadian S4? And how are the wifi and speakers issues after you flashed the TCE-I337MUMUEMK6?
[AT&T Samsung Galaxy S 4 General] klevismartini:
hi, i never try to flash other version of firmware just the original telcel,

i think it will soft brick your phone.

im using the Mexican telcel version.

the phone now in in excellent conditions.

you can flash your priginal bell rom no?
[AT&T Samsung Galaxy S 4 General] klevismartini:
hidden code 0011 problem

hi to all telcel i337m users that wants to unlock the s4. the method that i describe before its working fine

UNTIL we perform e reset of the phone+data. after the reset the phone will become locked again.

SO PAY ATTENTION.
[AT&T Samsung Galaxy S 4 General] frano356:
Questions

soooooo...

first off Id like to know what network im locked to, since my phone has no brandings i cant really tell :eek:

my model is sgh i337m and the kernel version is I337MVLUEMK6.

Also I would like to know if there is a possible way to unlock the device running on 4.3 stock

im a bit familiar with odin, i have downgraded a few s3s in order to unlock them using the service method that was available for em.

so if it is odin related I may be able to do it.

any help would be appriciated
[AT&T Samsung Galaxy S 4 General] zanchal:
Tried on my Koodo S4 SGH-1337M and does not work.
[AT&T Samsung Galaxy S 4 General] jarmenti:
Thats odd what rom are you on? , I was just able to successfully unlock a telus s4 that was on mk6 (4.3) rom simply by installing the oldest rom on sammobile for the koodo i337m. After I did this the instructions worked and I successfully have a rogers sim working in it.
[AT&T Samsung Galaxy S 4 General] jenthenurse:
4203 639952

Hi i can only get as far as step 3 to service mode then when i press menu and back no main menu for service mode comes up so i cant go any further. Any suggesstions. thanks
[AT&T Samsung Galaxy S 4 General] smortguy:
It's not showing any menu

Hi there,

I can't get any other menu . It shows ServiceMode. On pressing back or keyinput 1, there is no response.

Please guide.

Thanks.
[AT&T Samsung Galaxy S 4 General] Huggaroot:
On MK2 SGH-1337

It does in fact work if you flash the phone modem back to MDL the phone unlock options comes back to you. I know for a fact it work I took my phone to the T-Mobile the other day so the people having trouble try that method it networked unlocked my phone.
[AT&T Samsung Galaxy S 4 General] scott14719:
It works for some. If you read back through the thread you will see that it doesn't always work even with the MDL modem. So saying, "It did in fact work for me..." would probably be better than saying, "It does in fact work..." so people will know that it worked for you, and it might work for them, but it doesn't always work.
[AT&T Samsung Galaxy S 4 General] seanb1979:
i cant seem to get the service mode to come up
[AT&T Samsung Galaxy S 4 General] Gerry7:
You may have to flash your rom to an earlier version.
[AT&T Samsung Galaxy S 4 General] MuhammadTH:
Can you tell me

Hello,

I have simple 3 questions

1. can you please tell me that if this procedure will work with android 4.2.2 / Sgh m919v ?

2. Can i update my android after this ?

3. after this procedure am i gonna lose all my apps and data on mobile ?

Your help will be appreciated :)
[AT&T Samsung Galaxy S 4 General] CZ Eddie:
If I go through all the steps and then the phone reboots on its own, is that 100% for sure that it's SIM unlocked now?

I'm AT&T S4 on AMDL firmware and don't have a SIM to test with.

But the buyer of my phone requested this as a stipulation to our transaction.

So I need to be sure that it worked.
[AT&T Samsung Galaxy S 4 General] jd1639:
I'd see if you could borrow someone's sim

Sent from my Nexus 5
[AT&T Samsung Galaxy S 4 General] edgar270787:
it worked for me on a Galaxy S4 from telcel, i had to downgrade to an earlier stock rom, then i followed the process, it was weird for me because i always got the Network lock code message while on the old Stock fimware, so i tought it didnt work, but when i installed the latest firmware the phone was unlock :D
[AT&T Samsung Galaxy S 4 General] CZ Eddie:
So there isn't a setting somewhere you can look at to see if it's unlocked? You've gotta use a SIM to be sure? That sux.
[AT&T Samsung Galaxy S 4 General] Duffmantp:
If you upgraded 4.3. and rooted your phone and installed safestrap. You could just flash the MDL radio. That's what I did. All radio after MDL has service mode locked.
[AT&T Samsung Galaxy S 4 General] mhdez01:
problem with step 3

hi i just tried this and i do step 1 and 2 no problem but when i do step 3 i dont get the service menu to pop up....all i get to is this screen(photo attached)
[AT&T Samsung Galaxy S 4 General] elaraj:
hi

I did whole steps but phone still show me invalid sim
[AT&T Samsung Galaxy S 4 General] elaraj:
which software you running ? 4.4.2 ?
[AT&T Samsung Galaxy S 4 General] upndwn4par:
I just unlocked last night. Everything worked fine for me.

Tested with a T-Mobile sim and GTG...
[AT&T Samsung Galaxy S 4 General] $ideWinder:
I have a phone unlocked on version 4.2.2 . Will it still remain unlocked after I update it to Kitkat?
[AT&T Samsung Galaxy S 4 General] biggio78:
thks for the explication!

unlock with success

samsung s4 at&t

firmware 4.2.2

:laugh:
[AT&T Samsung Galaxy S 4 General] davidisurf:
Great

Very nice

Worked fine for me
[AT&T Samsung Galaxy S 4 General] klevismartini:
S4 i537 hidden code not working???

hi, to all, can any one explain me why my gs4 active is not showing nothing throw MF1 baseband that i just flashed the full leaked rom MF1!!!

please in need to unlock it so can someone help me?

thanks
[AT&T Samsung Galaxy S 4 General] gparisoe:
can not unlock S4 AT&T SH-I337 I337UCUAMDL

Need some help. I cant seem to get this phone carrier unlocked. I imaged back to stock ROM inserted several different carriers sim card (Verizon and Sprint)(the correct one) and can not get the phone to request the unlock code (which I have purchased). I also tried free method going thru the Service mode menu and no luck. I am at a loss. any help would be much appreciated.
[AT&T Samsung Galaxy S 4 General] upndwn4par:
This device will not work on Verizon or Sprint. AT&T or T-Mobile only.

You must also be running the correct firmware and radio.

Sent from some device using XDA Premium mobile app
[AT&T Samsung Galaxy S 4 General] gparisoe:
What firmware and radio, can you be specific?

Thank you

---------- Post added at 04:15 AM ---------- Previous post was at 04:02 AM ----------

Can you be specific the firmware and radio?

Any help is much appreciated.
[AT&T Samsung Galaxy S 4 General] upndwn4par:
If I remember correctly I had to flash a MDL ROM and radio.

If you are on Kit Kat, I am not sure what you need to do. Be careful what firmware you flash...

You can find some more info here:

http://xdaforums.com/showthread.php?t=2595457

You mentioned that you purchased an unlock code. If so, all you should need is a T-Mobile sim card (I think that's the prodecure - never used an unlock code before).
[AT&T Samsung Galaxy S 4 General] andy xu:
Step 2: Press the Menu button followed by the Back key. Then, hit the Menu button again and select KEY INPUT. Enter 1 and press the OK button to enter ServiceMode.

When the input 1, it does not pop up the service mode option

Command can not be used SGH-I337??
[AT&T Samsung Galaxy S 4 General] jamesw1224:
need help

this dosent work... my galaxy s4 from at&t keeps shutting down and restarting
[AT&T Samsung Galaxy S 4 General] jd1639:
Keep in mind, this was working when people were on mdb/mdl firmware. It most likely won't work on the latest firmwares.
[AT&T Samsung Galaxy S 4 General] jamesw1224:
help

my phone keeps shuting off... what do i do. im trying to put a metro pcs sim card into a att galaxy s4 phone
[AT&T Samsung Galaxy S 4 General] sway8966:
A year ago, when I was on 4.2.2 with MDL modem, I tried this sim unlock method. It did not work for me because I had already flashed my phone with custom rom (clear rom 1.5) when I used this method. This method only works if the phone is still on the stock rom with MDL modem.

I end up buying the unlock code on the net (paid around $30) to do the sim unlock. I tested with verizon and t-mobile sim cards and it works with t-mobile sim card, but not with verizon. I used the phone in Canada and also in Thailand with no problem.
[AT&T Samsung Galaxy S 4 General] elaraj:
hi does that work for I337 AT&T software 4.2.2 Mk3 ? Thanks
[AT&T Samsung Galaxy S 4 General] ImDonly1:
Regionlock away method worked for me. It just rebooted the phone with no notification on bootup. I tried a t-mobile sim a few days later and it worked.

Just did the AWS unlock but can't test it yet since I don't have access to another t-mobile sim.

I am on MF3 modem with MDL baseband running 4.4.2 GPe rom.
[AT&T Samsung Galaxy S 4 General] bl3ckjeck:
GT-I9505 does not work this way.

why?
[AT&T Samsung Galaxy S 4 General] redhonker:
Hi,

I have a rooted MK2.

However, when I get to step 6, option 3 PERSO SHA256 OFF does not exist. It only has 2 options:

[1] PERSO SHA256 Info

[2] RAT_FREE_SUPPORTING ON

What should I do?

Thanks
[AT&T Samsung Galaxy S 4 General] redhonker:
Could anyone explain how to "flash the phone modem back to MDL"? And what's the impact of doing that?

Thanks
[AT&T Samsung Galaxy S 4 General] :
Please read OP first

http://xdaforums.com/showthread.php?t=2496517
[AT&T Samsung Galaxy S 4 General] SystemErrorOne:
I also used that same app and it SIM unlocked as well as region unlocked my ATT S4. So heck yeah :highfive:
[AT&T Samsung Galaxy S 4 General] Norcalz71:
For clarification since this is a huge thread now and I sometimes jumble the terms - is this process the proper unlock for international use? I am on an AT&T S4 MDL, and will be traveling to France for a few weeks next month and was planning to grab a local prepaid SIM while over there.

Also, it appears AT&T will provide me with an unlock code per the request form on their site and a discussion I had with a rep - is their process different and/or desirable over just doing this process on my own, and does it accomplish the exact same thing? I have no intention of leaving AT&T as I have grandfathered unlimited data, but just wish to be on a local prepaid while overseas.

Thanks, sure that was answered in one of the 50+ pages of posts but where, I am not sure.
[AT&T Samsung Galaxy S 4 General] jd1639:
I would use the unlock code at&t gives you. This process comes with risks. It can permanently make your phone unlockable if you make too many attempts.
[AT&T Samsung Galaxy S 4 General] Norcalz71:
Well looks like they actually won't give me the code despite earlier conversations. Is there a real and likely danger of screwing this process up and ruining the phone (might try it once and if failed just stop) or should it be alright to at least test? I am still on 4.2.2 MDL one of the first 32gb S4's into the store.

Thanks
[AT&T Samsung Galaxy S 4 General] :
I thought Obama signed a law requiring carriers to provide unlock codes--:confused:
[AT&T Samsung Galaxy S 4 General] jd1639:
I don't know if it's 5 or 10 attempts but after a number of failures to unlock your phone won't be able to be unlocked. You could try this a couple of times. You can also but a code online but they're are some shady operators there. Don't go for the lowest cost if you go that route.

Edit, try this http://www.att.com/esupport/article.jsp?sid=KB102449&cv=820#fbid=mF0Y-mPK_8W
[AT&T Samsung Galaxy S 4 General] djmasters:
Unlocked my NC1 S4 with RegionLock Away a few minutes ago. Seems to have worked great and totally worth $2.79. Popped in my old T-Mobile SIM, no unlock code request, eventually got a SIM Not Provisioned error. Very handy since I got my phone used and apparently the previous owner hasn't fulfilled his/her contract yet and AT&T won't unlock it for me.
[AT&T Samsung Galaxy S 4 General] idtheftvictim:
I'm trying to SIM-unlock an AT&T S4 with NC1 firmware, the instructions in the OP don't work. I tried using RegionAway and it didn't seem to work. Steps I took:

1. Phone is rooted(from long ago)

2. Downloaded and installed RegionAway

3. Ran RegionAway and clicked unlock

4. Then clicked reboot now.

5. Phone rebooted

6. Shut down phone

7. Put in T-Mobile sim and booted

8. still asked for Sin unlock code

I also tried to unlock it with the t-mobile sim in the phone, same thing...

For anyone who has unlocked this phone running NC1 firmware, can you provide step by step directions?
[AT&T Samsung Galaxy S 4 General] jmjoyas:
http://xdaforums.com/showthread.php?t=2852979
[AT&T Samsung Galaxy S 4 General] gottech:
I was able to find the phone control hidden menu option using shortcut master lite on NC1 all the menu options are present that are required to unlock while following hidden menu unlock procedure. I chose secret code explorer, then I scrolled down to code 27663368378 then launch 0. I believe you need to be. Rooted for this method

I337 stock NC1, rooted, unlocked

Sm-T537A NE1stock, rooted
[AT&T Samsung Galaxy S 4 General] nadish:
If the device does not get unlocked by this, would I be able to unlock it using an unlock code?
[AT&T Samsung Galaxy S 4 General] merikgvr4:
Any tips on how to do this. Do I need to dl an app?
[AT&T Samsung Galaxy S 4 General] jd1639:
Give this a try http://xdaforums.com/showthread.php?p=54932702
[AT&T Samsung Galaxy S 4 General] merikgvr4:
Thanks. Do you know if I jeed to go back to nb1 as my phone has nc1 loaded.
[AT&T Samsung Galaxy S 4 General] jd1639:
Don't know for sure, you could always Odin back to nb1
[AT&T Samsung Galaxy S 4 General] gottech:
Shortcut master lite from the Play Store

I337 stock NC1, rooted, unlocked

Sm-T537A NE1stock, rooted
[AT&T Samsung Galaxy S 4 General] merikgvr4:
Was able to get into service menu but the last step my phone didn't have.

Tap 3 PERSO SHA256 OFF.
[AT&T Samsung Galaxy S 4 General] DeadlySpyder:
I fallowed OP. But still not working for me
[AT&T Samsung Galaxy S 4 General] Harry TestTickles:
*See post below*
[AT&T Samsung Galaxy S 4 General] Harry TestTickles:
Thanks to gottech.
[AT&T Samsung Galaxy S 4 General] ibtisam.jawad:
Sim Unlock SGH-I337 on 4.4.2 with I337UCUFNC1

Hi All, I got an AT&T SGH-I337 and I tried following the instructions posted by Harry TestTickles and it worked for me. However, I had to do a few more things, so that'w why I'm posting below in hope that someone else can benefit from it. I'm now able to use my AT&T SGH-I337 on Simple Mobile (uses T-Mobile towers).

0. Remove the Sim from your phone

1. Use Towelroot to Root your phone

2. Download Superuser.apk (from downloadandroidroms) and install it. Try to disable Knox using Superuser (it likely won't work).

3. Go to Play Store and install Android Terminal Emulator.

4. Use the terminal emulator to disable Knox. su then pm disable com.sec.knox.seandroid.

5. Now download Shortcut Master (Lite) from Play Store

6. Run Shortcut Master (Lite) and go to Secret Code Explorer

7. Find 27663368378, tap on it, and select Launch 0. You will now see the ServiceMode Main Menu

8. Tap on [1] UMTS

9. Tap on [6] Common

10. Tap on [6] NV REBUILD

11. Tap on [4] Restore Back-up. Your phone will now reboot.

12. Once the phone has Rebooted, turn it off again. Insert your off-network SIM (Simple Mobile in my case) and start your Phone. You should have network connectivity when the phone starts up. Go to Mobile Networks and disable Mobile data and reboot one more time. Once the phone has rebooted, enable mobile data again. You should now be able to call, text, mms, and browse the net on your SGH-I337.

13. All credit goes to the various posters on xda-developers and androidcentral. I simply followed the footsteps of giants. I do not claim any credit for this. Nor do I claim any responsibility for your phones and actions. Follow this with caution. Do not follow this if you don't know what your're doing. As with anything of this nature, you might end up bricking your phone. Proceed at your own peril.

Note 1: Phone MUST be rooted. I tried without root and this did not work.

Note 2: Grant superuser access to apps when the ask them.

Note 3: I did NOT try without disabling Knox.

Note 4: I did not see PERSO SHA256 OFF under UMTS > Debug Screen > Phone Control > Network Lock.

Note 5: I can send you a screen shot of my phone. I wasn't able to post it in here.

Cheers!
[AT&T Samsung Galaxy S 4 General] Adizzzle:
Thanks buddy, this worked flawlessly

on my I337M running PhoeniX ROM.

Surprised this actually worked on a

Custom ROM, and with such ease.

Careful though. There are a lot of

options in there that could mess you up.

Cheers err'ybody!
[AT&T Samsung Galaxy S 4 General] ibtisam.jawad:
I got an other AT&T SGH-I337 with 4.4.2 and I337UCUFNC1 baseband to try to replicate the steps in my earlier post. I repeated the steps several times but nothing worked. I could not get the phone unlocked.

The one difference between this phone and the earlier one that worked was that it said SGH-I337 UD under the battery.

The other difference was in the UMTS menu. The PERSO SHA256 OFF and PERSO SHA256 ON options were not available, one the PERSO SHA256 INFO was there. This phone's menu also showed some DOCOMO related stuff, and it also showed something about RAT is now supported.

I followed several threads and tried several methods, nothing worked. I could not get the PERSO SHA256 OFF option. Under Common > Phone Control > NV Rebuild, the phone would sometimes show "Golden-back not exist" and sometimes it would show "Golden backup exists". But nothing unlocked this AT&T phone to Simple Mobile (~ T-Mobile).

I then tried the method posted in this thread: http://xdaforums.com/showthread.php?t=2595457

Specifically, the downgrade from NC1 to MF3 modem. After following the 19 steps listed there, my phone rebooted, and temporarily showed Simple Mobile signals. However, immediately after it started showing the dreaded "invalid sim, must reboot to detect sim" option. This error just wouldn't go away. I tried wiping cache, uninstalling Amazon app, factory rest etc. Nothing worked.

I realized that the error might be due to the MF3 modem so I factory-reset the phone and then flashed back to NC1 modem with SafeStrap. Then I followed the steps in the thread linked above from scratch AGAIN with the Simple Mobile SIM in the phone from the get go. This time, after installing the MF3 modem via SafeStrap, I wiped the dalvik cache BEFORE rebooting the phone. After the phone rebooted with MF3, now with wiped dalvik, it showed that it was upgrading applications. After that was finished, I ran the RegionLockAway. The phone rebooted again and after a few seconds showed Simple Mobile signals.

So far the phone has not shown the invalid sim, unable to detect sim, must reboot error message. I believe that wiping the dalvik cache after MF3 modem install and before rebooting helped.

Just putting this out there. The steps in my earlier post do not work for all AT&T S4 on 4.4.2 and NC1.
[AT&T Samsung Galaxy S 4 General] Harry TestTickles:
Just an update. I finally got ahold of a Koodo sim card and my phone was

not

unlocked. I actually lost network connection a few days after playing around with the settings! Everything worked except connecting to my provider. I ended up downloading a Rogers KitKat firmware so I thought and after flashing it was a 4.2.2!! About crapped my pants as I was sure it was the 4.4.2 and happy my phone was not bricked.!!!.

So I guess downgrading to 4.2.2 can be done with no side affects, but I am NO expert, just a tinkerer that got lucky!!

Got my network connection back but no sound or WiFi and very unstable. So I then went into the phone dialer options and lo and behold all the options were there ( using the *#0011# ).

All seemed to go well, I just have to get another sim card from a different carrier and try it again. I have reloaded the stock 4.4.2 firmware from Fido and my phone is working just fine now... was crapping car sized bricks for awhile there lol.
[AT&T Samsung Galaxy S 4 General] jd1639:
Why? You have an i337m where the bootloader is not locked. Even if you had an i337 Odin would have just failed. It would not have bricked the device. So you almost crapped your pants for nothing, lol
[AT&T Samsung Galaxy S 4 General] Harry TestTickles:
Cuz I am a noob at this!! lol.

Sometimes this site has overwhelming info ( not complaining!! ) and its easy to contradicted oneself. At least crappin my pants, I dont need to work out now :D

Just glad my phone is up running and happy!!! Thanx to all the contributors here!!! You guys are awesome!

Just checked and my phone still isn't unlocked... doh. Wonder what went wrong???

Guess I will flash 4.2.2 and try it again
[AT&T Samsung Galaxy S 4 General] Harry TestTickles:
Well flashed 4.2.2 with MDL modem again and used Region LockAway and lo and behold, my phone is now sim unlocked YAY. Have now flashed again with a few hiccups but figured it all out and it is now back to 4.4.2 and running great again
[AT&T Samsung Galaxy S 4 General] gigo08:
This worked for me on AT&T S4 running NC1

The process above worked very well for me, except I omitted a couple of steps. I did not do steps 2, 3 and 4. The rest I followed as described and I had no issues. Tested it with a T-Mobile sim, got data and voice working just fine.

Thanks all!
[AT&T Samsung Galaxy S 4 General] moonrocker316:
unlock galaxy s4 (canadian)

trying it now.

Update: It did not work! I follow the procedure to the point. the phone rebooted as it should and then it entered the new SIM and got SIN lock screen. my build number is NE1. on I337m

"Quote:

Originally Posted by ibtisam.jawad

A256 OFF under UMTS > Debug Screen > Phone Control > Network Lock.

Note 5: I can send you a screen shot of my phone. I wasn't able to post it in here.

Cheers!"
[AT&T Samsung Galaxy S 4 General] moonrocker316:
Anyone with model I337m and Baseband NE1?

Hi, Just wondering if anyone with model I337m and Baseband NE1 was able to successfully unlock their S4 ( without the unlock code).

I have stock Rom. Rooted. Locked to Canadian Fido Network.

I tried:

1. Reagion unlock- Didn't work ( it just changed my modem, which actually enable me to go to service menu)

2. Shortcut master (which enable me to go the UTMS service menu), + I tried all the instruction like the individual just above my previous post.

3. I tried to do it form the Phone control menu, like the first Post, and didn't find "PERSO SHA256 OFF" . I don't have 3 options there. just one,.PERSO SHA256 Info.

Any help will be much appreciated.

thanks.