How to Carrier Unlock Your Samsung Galaxy S4

How to Carrier Unlock Your Samsung Galaxy S4

With this softModder tutorial, we're going to show you how to quickly and easily unlock your Samsung Galaxy S4, models GT-I9505 and GT-I9500. If you have a different model, check out the note at the bottom of this article. If you have a Galaxy S3, check out this tutorial for help.

Warning

Before you start, make sure your device is backed up. Messing around with SIM carrier stuff can be risky, so you never know. It might explode. Not our fault.

Step 1Dial the Secret Number

Launch the phone dialer and enter *#27663368378#, but DO NOT press call. The phone will automatically take you to the ServiceMode menu.

Step 2If That Code Fails...

In case *#27663368378# doesn't do anything on your model, try entering *#0011#instead.

This will take you to the basic information section of ServiceMode.

From there, press the Menu button on your device and then the Back key in the menu—not your phone's menu key.

Tap on the Menu button again, but this time press Key Input.

Enter 1 and press OK.

Wow. A lot harder, right?

Step 3Select Debug Screen

You should now be at UMTS MAIN MENU in ServiceMode. Select [1] DEBUG SCREEN.

Step 4Select Phone Control

At the DEBUG SCREEN, you'll see six options. Select [6] PHONE CONTROL.

Step 5Select Network Lock

From the Phone Control screen, select [6] NETWORK LOCK.

Step 6Select Perso Off

On the next page, you should see three options. Select [3] PERSO SHA256 OFF.

Step 7Go Back to Main Menu

Now, head back to the Main Menu by tapping on the Menu button and then the Back key (from the menu).

Step 8Select Common

On the UMTS MAIN MENU, select [6] COMMON.

Step 9Select NV Rebuild

Now, tap on [6] NV REBUILD.

Step 10Restore Back Up & Reboot

Finally, the phone will notify you that a Golden-Backup exists. Select [4] Restore Back-up.

Your Galaxy S4 will now reboot automatically, which might take a few minutes. Once it's back on, the network will be unlocked, allowing you to use any SIM card that will work in your model phone.

You're welcome.

For SGH-M919, SGH-1337, & SGH-1337M Models

While the above process is supposed to work for most Samsung Galaxy S4s, there was trouble accessing the UMTS MAIN MENU with our Galaxy S4 (SGH-1337). If you got it to work or know of another way to access the menu, let us know how.