Develop Bugs

[Q] Cannot unlock AT&T GS3 with unlock code

I bought a ATT Galaxy S3. The seller called AT&T and got the unlock code. I popped in a Simple Mobile sim card and it says "SIM network unlock pin". I then entered 8 digit unlock code got from AT&T. But it did work. Still asking for sim network unlock pin.
Has anyone had same problem. Is Simple Mobile causing this problem, since it's a prepaid network? Do I have to use one of the big GSM networks sim card to unlock first then use Simple Mobile sim card?
Any help would be highly appreciated.

try this
it worked for me on my 2nd s3 running 4.0.4 stock ics (just got) =)
make sure no sim card inside the phone yet, if there is, just take it out
Dial *#197328640#
Main Menu > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > (after choosing this option, wait about 30 seconds, then go back one step by pressing the Menu button then select Back, now you are in [6] Network Lock then choose [4] NW Lock NV Data INITIALLIZ ..... wait for a minute then reboot your phone...
there won't be any confirmation just reboot your phone, put your sim back in, wait for about 10-30 seconds for your phone to pick up the network and kabaaam it is unlocked, the timing is important btw

Make sure the IMEI used to get the unlock code is 100% correct.
Secondly, if the phone has had previously failed unlock attempts on it, you may need to use a Defreeze code to reactivate an unlock attempt. The phone may be rejected the unlock code (even if correct) because of this.

pcshano said:
try this
it worked for me on my 2nd s3 running 4.0.4 stock ics (just got) =)
make sure no sim card inside the phone yet, if there is, just take it out
Dial *#197328640#
Main Menu > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > (after choosing this option, wait about 30 seconds, then go back one step by pressing the Menu button then select Back, now you are in [6] Network Lock then choose [4] NW Lock NV Data INITIALLIZ ..... wait for a minute then reboot your phone...
there won't be any confirmation just reboot your phone, put your sim back in, wait for about 10-30 seconds for your phone to pick up the network and kabaaam it is unlocked, the timing is important btw
Click to expand...
Click to collapse
Strange. I thought this was only for 4.1.1. It didn't work on my wife's 4.0.4 but worked on my 4.1.1
Sent from my SAMSUNG-SGH-I747 using xda premium

pcshano said:
try this
it worked for me on my 2nd s3 running 4.0.4 stock ics (just got) =)
make sure no sim card inside the phone yet, if there is, just take it out
Dial *#197328640#
Main Menu > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > (after choosing this option, wait about 30 seconds, then go back one step by pressing the Menu button then select Back, now you are in [6] Network Lock then choose [4] NW Lock NV Data INITIALLIZ ..... wait for a minute then reboot your phone...
there won't be any confirmation just reboot your phone, put your sim back in, wait for about 10-30 seconds for your phone to pick up the network and kabaaam it is unlocked, the timing is important btw
Click to expand...
Click to collapse
Without a SIM, my phone will not dial this code. I've read that if I just try thee Unlock code all 10 times, on the 11th time, it will work. Some Windows Phone forum said that worked for several people.

found this online and it worked for me
hazelinelee said:
I bought a ATT Galaxy S3. The seller called AT&T and got the unlock code. I popped in a Simple Mobile sim card and it says "SIM network unlock pin". I then entered 8 digit unlock code got from AT&T. But it did work. Still asking for sim network unlock pin.
Has anyone had same problem. Is Simple Mobile causing this problem, since it's a prepaid network? Do I have to use one of the big GSM networks sim card to unlock first then use Simple Mobile sim card?
Any help would be highly appreciated.
Click to expand...
Click to collapse
Do the following:
1. Make sure that the phone PROMPTS for the code with a NON accepted sim card and that your IMEI is correct by dialing *#06#
a. Go to the Dial pad and dial *#197328640#
b. Please click on number [1] UMTS > [1] Debugging screen > [8] Phone Control > [6] NETWORK LOCK
c. You will see 3 options
d. Please click on number [1] Perso Sha256 INFO, the screen will change slightly
e. Please hit the MENU button then when the menu pops up please carefully hit BACK to return to the previous screen
f. Next Please click on number [2] Perso Sha256 ON, the screen will change again to a one line message
g. Restart the phone on the screen by holding the power button and click RESTART
h. When the phone prompts for the unlock code simply enter the unlock code provided to you
i. Your phone is now permanently unlocked

4.1.2 unlock?
rcharity23 said:
Do the following:
1. Make sure that the phone PROMPTS for the code with a NON accepted sim card and that your IMEI is correct by dialing *#06#
a. Go to the Dial pad and dial *#197328640#
b. Please click on number [1] UMTS > [1] Debugging screen > [8] Phone Control > [6] NETWORK LOCK
c. You will see 3 options
d. Please click on number [1] Perso Sha256 INFO, the screen will change slightly
e. Please hit the MENU button then when the menu pops up please carefully hit BACK to return to the previous screen
f. Next Please click on number [2] Perso Sha256 ON, the screen will change again to a one line message
g. Restart the phone on the screen by holding the power button and click RESTART
h. When the phone prompts for the unlock code simply enter the unlock code provided to you
i. Your phone is now permanently unlocked
Click to expand...
Click to collapse
will this work with Android 4.1.2?

sumkindazombi said:
will this work with Android 4.1.2?
Click to expand...
Click to collapse
No. I have tried the unlock methods on the web that work for Android 4.1.1 on the AT&T Samsung i747, and they do not work on Android 4.1.2. I have been unable to find any accurate directions for unlocking this version, but there are apparently lots of people who will misdirect you to the old instructions for the previous version.

[Q] US Cellular Galaxy SIII (SCH-R530U) on T-Mobile network

I ordered a Samsung Galaxy SIII (US-Cellular) on ebay and tried to follow the instructions below:
1. Type *#197328640# and it brings up the factory service menu
2. Select (1) UMTS
3. Select (1)Debug Screen
4. Select (8) Phone Control
5. Select (6)Network lock
6. Inside the Network lock menu, Pick option (3) Perso SHA256 off, Passed that is a screen that says something like "no options in this menu, current command is 11863", Wait for 30-60 secs, from there hit the menu button on bottom left of phone to bring up options, Select "Back".
7. The last command should have brought you back into the Network Lock menu, at the bottom is (4) NW Lock NV Data Initialize, Select it. You might be asked a saftey are you sure, some people not, after it begins that process wait a good 60 sec the reboot. Thats it! Phones Unlocked
Somehow the phone is not reacting on the USSD 'secret' codes. I can push the hash-button, but nothing happens. I found on a forum that I should root my phone. So I did through Odin. But superSU keeps crashing and I get the error: Security Notice, an attempt to access a secure area...
I don't really need a rooted phone, would be nice, but I would like to use USSD codes, like *#06# for example.

R530 is CDMA based and might not function correctly on TMo.
Also, USSD codes only work on TW-Based ROMs or stock. Root should have no bearing.

Diego_AL said:
I ordered a Samsung Galaxy SIII (US-Cellular) on ebay and tried to follow the instructions below:
1. Type *#197328640# and it brings up the factory service menu
2. Select (1) UMTS
3. Select (1)Debug Screen
4. Select (8) Phone Control
5. Select (6)Network lock
6. Inside the Network lock menu, Pick option (3) Perso SHA256 off, Passed that is a screen that says something like "no options in this menu, current command is 11863", Wait for 30-60 secs, from there hit the menu button on bottom left of phone to bring up options, Select "Back".
7. The last command should have brought you back into the Network Lock menu, at the bottom is (4) NW Lock NV Data Initialize, Select it. You might be asked a saftey are you sure, some people not, after it begins that process wait a good 60 sec the reboot. Thats it! Phones Unlocked
Somehow the phone is not reacting on the USSD 'secret' codes. I can push the hash-button, but nothing happens. I found on a forum that I should root my phone. So I did through Odin. But superSU keeps crashing and I get the error: Security Notice, an attempt to access a secure area...
I don't really need a rooted phone, would be nice, but I would like to use USSD codes, like *#06# for example.
Click to expand...
Click to collapse
What you are trying to do is unlock the phone from US Cellular to use on T-Mo. If that's the case, you will have to downgrade the firmware to Android version 4.1.1. This does not require Rooting. You will see appropriate firmware on SamMobile.com. Try the same process after the downgrade.
Don't try the downgrade if you are on android 4.3. It will Hard Brick your phone.

ATT Samsung S4 MF3 - How to get to SIM Unlock Screen

Hi guys,
A while back I tried to enter a sim unlock code with my T-Mobile sim card and this did not work. Now when I insert the SIM I just get an error MM#6 Not allowed. Is there any way I can get the screen/prompt to enter the SIM unlock again? I have tried a bunch of the *# numbers online but I have been unsuccessful in getting this screen to be displayed so I can enter a new SIM Unlock code. Thanks!

fredanthony said:
Hi guys,
A while back I tried to enter a sim unlock code with my T-Mobile sim card and this did not work. Now when I insert the SIM I just get an error MM#6 Not allowed. Is there any way I can get the screen/prompt to enter the SIM unlock again? I have tried a bunch of the *# numbers online but I have been unsuccessful in getting this screen to be displayed so I can enter a new SIM Unlock code. Thanks!
Click to expand...
Click to collapse
Not that it would really matter, but the guys in the AT&T forum may be more able to assist in this since your device is the AT&T device. Also, what ROM are you using when you try to enter the code? I do believe you have to be on a TouchWiz (custom or stock) not AOSP to enter that menu.

re: network lock issue
fredanthony said:
Hi guys,
A while back I tried to enter a sim unlock code with my T-Mobile sim card and this did not work. Now when I insert the SIM I just get an error MM#6 Not allowed. Is there any way I can get the screen/prompt to enter the SIM unlock again? I have tried a bunch of the *# numbers online but I have been unsuccessful in getting this screen to be displayed so I can enter a new SIM Unlock code. Thanks!
Click to expand...
Click to collapse
Try this, I am not sure that it will work but it will take you to the screen for network unlock
.Goto phone dailer, and enter *#27663368378# for the debug service menu.
In "ServiceMode", select [1] UMTS
In "UMTS MAIN MENU", select [1] DEBUG SCREEN
In "DEBUG SCREEN", select [6] PHONE CONTROL
In "PHONE CONTROL", select [6] NETWORK LOCK
Good luck!

[Q] Problems unlocking s3

Hey guys. You've probably had a bunch of posts like this, but I've spent the past day frustratedly searching up as much about this as possible and I still can't find an answer.
My mother gave me her old Galaxy S3 which had been network locked. I've checked the IMEI blacklist and it doesn't seem to be on 3 that you can check for free.
The phone is a UK Samsung Galaxy S3 GT-i93505, originally on contract to Orange. I used Odin and flashed the firmware from 4.1.2 to JB 4.1.1 as far as I know, so that I could unlock. Everything was successful.
I followed the numerous guides on entering Service mode > Debug > Phone Control >Network Lock > PERSO SHA256 OFF > SHA256_ENABLE_FLAG [0] SHA256_OFF=>Not Change > Current Command is 118630.
From here of course, I go back, hit NW LOCK NV DATA INITIALLIZ > PERSO_NV_INIT is SUCCESSFUL.
From here I wait, shut down, restart, enter my new sim, but nothing changes. Any network access is still locked. I've read on one forum that people have had success when they 'change' ENABLE_FLAG from [0] to [1], but i can't find any instruction on how to do this. I've also read that the process only works when the Current Command is 118640 not 118630, but after repeated tries the code will not change.
It's doing my nut in, I don't want to pay for an unlock code or some guy down the highstreet to unlock it when I see so many people doing it themselves...any help would seriously be appreciated, i'm new at all this.
Thanks!

Are you using the unlock method from this forum? If you are, it may not work as it is designed to work with the i747 and i747m.

ninpo-bugei said:
Hey guys. You've probably had a bunch of posts like this, but I've spent the past day frustratedly searching up as much about this as possible and I still can't find an answer.
My mother gave me her old Galaxy S3 which had been network locked. I've checked the IMEI blacklist and it doesn't seem to be on 3 that you can check for free.
The phone is a UK Samsung Galaxy S3 GT-i93505, originally on contract to Orange. I used Odin and flashed the firmware from 4.1.2 to JB 4.1.1 as far as I know, so that I could unlock. Everything was successful.
I followed the numerous guides on entering Service mode > Debug > Phone Control >Network Lock > PERSO SHA256 OFF > SHA256_ENABLE_FLAG [0] SHA256_OFF=>Not Change > Current Command is 118630.
From here of course, I go back, hit NW LOCK NV DATA INITIALLIZ > PERSO_NV_INIT is SUCCESSFUL.
From here I wait, shut down, restart, enter my new sim, but nothing changes. Any network access is still locked. I've read on one forum that people have had success when they 'change' ENABLE_FLAG from [0] to [1], but i can't find any instruction on how to do this. I've also read that the process only works when the Current Command is 118640 not 118630, but after repeated tries the code will not change.
It's doing my nut in, I don't want to pay for an unlock code or some guy down the highstreet to unlock it when I see so many people doing it themselves...any help would seriously be appreciated, i'm new at all this.
Thanks!
Click to expand...
Click to collapse
I think the free unlock method will still work for the UK variant. The instructions are slightly different, however. Try the following steps ...
1) Put a non-compliant SIM in your device and reboot with the SIM inside. Click on dismiss when prompted for unlock code
2) Go to the dial pad and in *#197328640#.
3) Do the usual [1] UMTS => [1] Debug Screen => [8] Phone Control => [6] Network Lock
4) Options [3 ]PERSO SHA256 OFF and wait for around 30 seconds.
5) Hit Menu button and click on Back. Then Choose [4] NW Lock NV Data INITIALLIZ.
Enter *#197328640# again using the Key Input
If this doesn't work, after the first time at [3] PERSO SHA256 OFF, hit Menu => Back then [2] PERSO SHA256 ON then Menu => Back and repeat steps 4) & 5) again. You will notice that the info in [3] PERSO SHA256 will have changed.

Is there a way to unlock 5.1.1. OH1?

I already have root and have tried idones app to unlock, but for some reason, the unlock seems not to be working. The app says the phone is unlocked but when I insert a GSM sim card into the phone, it doesn't get any signal and the hands free activation loops. I was advised to go into settings -> mobile networks -> GSM, but the mobile networks setting disappears when I put in a GSM sim. It comes back if I put my Sprint sim is put back in. I also select GSM on that while my Sprint sim is in but when I take it out, that menu disappears. Is my phone unlocked or is it still locked? If its still locked, what steps can I take to unlock it given my current build and android version?

Idone should b able to help . Go to dialer, dial *#0011# ,
then in service mode press menu > back , then press menu > key input and type "Q" and press enter.
Then press menu > key input and type "0000" thats zero , 4 times .
The rest im copy n pasting from "jayfi" post iver at the us cellular forum
* - UE Settings & Info
- Settings
- Protocol
- NAS
- Network Control
- Band Selection
* Make these selections above
* *Make sure you use the more button in the upper right corner to go back if needed(Back Key on phone will exit menu)
* Choose choice 7 “LTE/GSM MODE ONLY”
* Reboot
* Go to settings/Wireless & networks/more and it will allow you to add the correct APN
* Change preferred network type to LTE
Let me know if you need clarification. I don’t have the phone in front of me currently but am pretty certain that is everything.
^^ after ding this itll go straigbg to gsm connection and bypass the cdma network. Let me know if you need help.

I have done all the steps up to 0000
After all those steps, the Service Mode Menu still looks the same, how do I get to the "UE Settings and Info"? It's not in my settings menu

Sent you a shortcut in pm . Let me know if u need help .

Can this work for the l720