SIM Unlock T-Mobile and AT&T Galaxy S4 SGH-M919 or SGH-I337

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Unknown on 7:18 PM

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Thinking of unlocking your SIM-locked Galaxy S4? Well, it’s very easy to get your device unlocked from the bondage of sticking to a single network from your carrier. Just type in the the 2 words “SIM Unlock” in your web search bar and you will be overwhelmed to see the results of sites that claim to unlock your device for a fee.

Advantages of having a SIM Unlocked Phone

Having SIM Unlocked your T-Mobile and AT&T Galaxy S4, you can-

• Enjoy a sense of freedom.
• Use your phone with any network provider around the world that means you can use any SIM card from a preferred service provider.
• Enjoy a permanent unlocked phone that means the device remains unlocked even after firmware update.
• Save money on roaming charges while travelling abroad.

Disclaimer: While the procedure given below has been tested by many users and it worked for most of them, we do not guarantee that it’ll work for you too. In many cases, the users make some mistake while following the steps, resulting in failure. Therefore, read the tutorial several times before proceeding and follow the steps carefully

How to SIM Unlock Galaxy S4 SGH-M919/SGH-I337

1. Open your phone’s dialer and dial the following code to enter the Service Menu on your Galaxy S4: *#27663368378#
2. Now select [1] UMTS by tapping on it.
3. When you get into the UMTS Main Menu, tap on [1] DEBUG SCREEN.
4. This will take you to Debug Screen menu where you have to select [6] PHONE CONTROL.
5. In the Phone Control menu, you will see an option called [6] NETWORK LOCK. Tap on it.
6. In the Network Lock screen, select  [3] PERSO SHA256 OFF.
7. On the next screen tap on SHA256_ENABLED_FLAG[1].
8. Doing this will show the following message:MENU NOT EXISTPRESS BACK KEY
9. Current Command is 116631
10. Now tap on the Menu button (left soft key on your phone) and select  Back  from the menu. (To go back, do not press the Back button of your device.) When you do this, you should see the following lines on the screen:SHA256_ENABLED_FLAG[0]SHA256_OFF => Not Change
11. Ignore the above message and tap on the Menu button again and then select Back.
12. Now you’ll see the Network Lock menu. Press the Menu button again and select Back. Repeat the Menu> Back action till you return back to the UMTS Main Menu.
13. Here you will find an option called [6] COMMON. Tap on it.
14. Next, select  [6] NV REBUILD.
15. In the NV Rebuild screen will look like as shown below. Tap on [4] Restore Back-up.
16. Doing this will freeze your T-Mobile/AT&T Galaxy S4 temporarily. The screen will turn Off , followed by the Menu and Back buttons light up and device reboot.

Finally, your Galaxy S4 SGH-M919/SGH-I337 will boot up normally and it’ll be SIM unlocked hopefully. To check  successful unlock, try a SIM card that is not from your network provider. Try the method and let us know how it went for you. Cheers and keep visiting!

Note: If this Tutorial and News worked for you (and it should work), please leave a comment below. Thanks.

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