Hi
Pls I recently got a T-Mobile Galaxy S4 from the USA. Upon inserting my Nigerian Sim card, the phone was requesting for SIM NETWORK UNLOCK PIN.

Please can anyone help me with that as I am unable to access any mobile network features.

Model: SGH-M919
OS: Android 4.4.4
Carrier: T-Mobile USA
IMEI No: 356420051454650 /07

Thank you

Awaiting

anyone

Here are the steps:
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
In "NETWORK LOCK", select [3] PERSO SHA256 OFF
It should show:
SHA256_ENABLED_FLAG[1]
SHA256_OFF => SHA256_ON
Now touch the first line SHA256_ENABLED_FLAG[1]
It should show:
MENU NOT EXIST
PRESS BACK KEY
Current Command is 116631
Now press the menu button and select "Back"
It should show:
SHA256_ENABLED_FLAG[0]
SHA256_OFF => Not Change
Again, press the menu button and select "Back", and you're back in the "NETWORK LOCK" screen
Press the menu button and select "Back", and you're in the "PHONE CONTROL" screen
Press the menu button and select "Back", and you're in the "DEBUG SCREEN" screen
Finally, press the menu button and select "Back", and you're back in the "UMTS MAIN MENU" screen
Select [6] COMMON
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
------------------------------
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. I hope this does it.

Thanks bro for your response.
But when I dialed the code, nothing happened. Is there another method?

The andriod version is 4.4.4

Thanks

Yes, there are always other methods...but I wondered why that method didn't work for you....go here: http://www.droidviews.com/sim-unlock-t-mobile-galaxy-s4-android-4-4-2-kitkat-firmware/ see if it helps

Juliano47:
Yes, there are always other methods...but I wondered why that method didn't work for you....go here: http://www.droidviews.com/sim-unlock-t-mobile-galaxy-s4-android-4-4-2-kitkat-firmware/ see if it helps

The method of this site is for 4.4.2 and it didnt work for 4.4.4 am running on

Pls, is there a way i can enter service mode on the phone? after the update to 4.4.4, dialing *#0011# cant take me to the UMTS any more.

Thanks

Hi Samuelzion. I know this has been a long time ago, but please, do you still remember how you got over this issue?
I have exact same device on my hands and having the same questions you raised above.

Please help me out