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How to Troubleshoot Samsung Galaxy S III

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When the codes don't work for this device, we do have this method that fixes any sort of tampering that may prevent unlocking. This is common with Galaxy devices.
If any part of this does not work, please let us know the exact details of what didn't work, what step, and what messages/errors you are getting.

The method:

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#

2. Go to the Dial pad and dial *#197328640#

3. Please click on number [1] UMTS > [1] Debugging screen > [8] Phone Control > [6] NETWORK LOCK

4. You will see 3 options

5. Please click on number [1] Perso Sha256 INFO, the screen will change slightly

NOTE: If you see ENABLE_FLAG[1], contact us. If you see ENABLE_FLAG[0], continue on.

6. Please hit the MENU button then when the menu pops up please carefully hit BACK to return to the previous screen

7. Next Please click on number [2] Perso Sha256 ON, the screen will change again to a one line message

NOTE: If you see ENABLE_FLAG[1], contact us. If you see ENABLE_FLAG[0], continue on.

8. Restart the phone on the screen by holding the power button and click RESTART

9. When the phone prompts for the unlock code simply enter the unlock code provided to you

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