T-Mobile Galaxy S4 Unlock

[vincent08]

You can unlock this phone from any phone unlocking website which is legal and does not void the contract with T-Mobile.

 

[monsieurms]

You can unlock this phone from any phone unlocking website which is legal and does not void the contract with T-Mobile.

Does unlocking disable any services, access to network, or even minor things like T-Mobile's app that tells you how many minutes you have? Not all of those are deal breakers, of course, but I'd like to know what I'm getting into.

I have no particular interest at the moment in unlocking my S-4, but my old phone I may give away.

 

[Campos Jr]

this link should do the trick!!!!

How to SIM unlock Samsung Galaxy S4 SGH-M919 (tested - works) - Updated: 6/15/13 - xda-developers

 

[monsieurms]

this link should do the trick!!!!

How to SIM unlock Samsung Galaxy S4 SGH-M919 (tested - works) - Updated: 6/15/13 - xda-developers

This seems to end with "restore backup" as the last command. That sounds scary--like I just got a tutorial designed to convince me to overwrite all the data on my phone?

What does that mean?

 

[jeslevine]

The Campos link worked for me. I can make calls with AT&T and tmobile. Only problem is the Internet on AT&T does not work. I suspect I need a setting because my phone is set for tmobile Internet settings

 

[monsieurms]

You can get your galaxy S4 unlocked from any vendors online

I imagine the OP has already resolved this, but note that prices are all over the place. Research carefully if you go that route. Some are wildly overpriced. If TM will do it for free....

 

[Palak Gupta1]

Hey Its Palak Here
i really have a huge problem i bought my samsung S4 from bangkok
and now its creating problems its just been one month and the camera is not proper nor are the games working
what do i do

 

[BookCase#AC]

Hi Everyone,

I'm a long time lurker and benefited greatly from the postings here at xda.
So I'd like to contribute something back.

After trying many methods and reading all the posts in the various S4 forums, I finally found a way for SIM unlock that works for me.

I have tested it, and it works on my T-Mobile S4.

Credit to these posts:

• KaneHusky's post for the dialer code
• This thread on how to unlock
• chavxxx's post pointing to the right final step

FAQ:

• Is this for real? Does it really unlock?
  YES! Many people have tried it, and most people have successes.
  If you are having problems with the unlock process, please read the rest of the FAQ.
• Will this SIM unlock work on my model of Galaxy S4 that is not T-Mobile (SGH-M919)?
  This unlock has been tried on the T-Mobile (USA) version of the phone, if you're coming from any other model, YMMV, it might or might not work.
  That being said, many others have tried it on the AT&T model, and on the international I9505 with success.
• Do I need to be on stock rom?
  Yes, you need to be on stock rom for this to work.
  One of the main causes of failure to unlock is people not flashing back to stock rom first. The reason is the special dial codes only work on stock roms.
• Is the unlock permanent? Do the unlock last through reboot/reflash/etc.?
  Yes, the unlock is permanent.
  You can reflash a custom rom, or do anything you want to the phone, and the unlock will stay.
• In step 7, my phone is already "SHA256_ENABLED_FLAG[0]", what should I do?
  Great, this is the setting you want.
  It means your phone already allows you to make some settings changes, it DOES NOT mean your phone is already unlocked.
  You should continue with the rest of the process until the last step.
• In step 14, backup missing.
  If the golden backup doesn't exist, try the work around found by GrndSers-Rcng:
  xda-developers - View Single Post - How to SIM unlock Samsung Galaxy S4 SGH-M919 (tested - works) - Updated: 7/2/13
• How do I know the unlock is successful?
  If your phone is not unlocked, when you put in an unauthorized SIM card, a dialog pops up on your phone asking you to enter the unlock code.
  If you're successful with this procedure, there would be no popup dialog asking for the unlock code when you put in any SIM card.

Here are the steps:

1. Goto phone dailer, and enter *#27663368378# for the debug service menu.
2. In "ServiceMode", select [1] UMTS
3. In "UMTS MAIN MENU", select [1] DEBUG SCREEN
4. In "DEBUG SCREEN", select [6] PHONE CONTROL
5. In "PHONE CONTROL", select [6] NETWORK LOCK
6. In "NETWORK LOCK", select [3] PERSO SHA256 OFF
   It should show:
   SHA256_ENABLED_FLAG[1]
   SHA256_OFF => SHA256_ON
7. Now touch the first line SHA256_ENABLED_FLAG[1]
   It should show:
   MENU NOT EXIST
   PRESS BACK KEY
   Current Command is 116631
8. Now press the menu button and select "Back"
   It should show:
   SHA256_ENABLED_FLAG[0]
   SHA256_OFF => Not Change
9. Again, press the menu button and select "Back", and you're back in the "NETWORK LOCK" screen
10. Press the menu button and select "Back", and you're in the "PHONE CONTROL" screen
11. Press the menu button and select "Back", and you're in the "DEBUG SCREEN" screen
12. Finally, press the menu button and select "Back", and you're back in the "UMTS MAIN MENU" screen
13. Select [6] COMMON
14. In "COMMON" screen, select [6] NV REBUILD
    Now you are in the "NV REBUILD" screen, you should see the following text:
    ------------------------------
    Golden-Backup exist
    You can Restore Cal/NV
    ------------------------------
15. Now for the final step.
    In "NV REBUILD" screen, select [4] Restore Back-up
    The button lights for menu and back should come on, and the phone will auto reboot in a few seconds.
    Note: chavxxx's post of selecting "[1] Load default NV" DID NOT work for me.

Congratulations, your phone is now unlocked.
Stick in a sim card from a different carrier and try it out.

Please post followups of your experience with this unlock method.

Thanks, and good luck!

SOURCE

And, Here's these:

AT&T APN SETTINGS

Name: ATT PTA
APN: pta
MMSC: http://mmsc.mobile.att.net
MMS Proxy: proxy.mobile.att.net
MMS port: 80
MCC: 310
MNC: 410
Auth: none
APN type: default,mms,supl,hipri

T-Mobile APN SETTINGS

Name: T-Mobile US
APN: fast.t-mobile.com
MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
MMS Proxy: Not set
MMS port: Not set
MCC: 310
MNC: 260
Auth: Not set
APN type: default,mms,supl
APN protocol: IPv4/IPv6
APN roaming protocol: IPv4/IPv6

Hope that helps.