UPDATE (14-Nov-2013): This method is only compatible with devices running Android 4.1.1 and older. This unlock method is not included in 4.1.2 and newer firmwares. This ONLY works with International devices, i.e: GT-I9300 (Galaxy S III) and GT-N7100 (Galaxy Note II). This will not unlock a device specified for a certain country/carrier.
So, you’ve bought yourself a Galaxy S3 or Note 2 from abroad or your thinking of travelling soon to international countries, but you haven’t in the least have a clue, if your device is compatible in those regions. A recognized developer on XDA, owl74, has concocted a facile method to factory unlock your Galaxy S3 or Galaxy Note 2.
This technique is useful for those who have bought a Galaxy S3 from the US or UK, imported into Pakistan, and are scouring to use it with a compatible network. (Works for any country.) Also, if your travelling and you need to use the same handset continuously, then use this method to use it worldwide on any carrier.
(This will only work on devices with the stock Samsung ROM.)
Follow the steps below to factory unlock your Samsung Galaxy S3 or Samsung Galaxy Note 2:
Disclaimer: Following these steps may lead to a bricked phone and/or result in voiding your warranty. This is rare, but PakDroid © will not be responsible for any harm done to your device.
- Open the phone app on your device and enter the following code in it:
- You will be presented with a menu. Go to ‘ UMTS’, then ‘ Debug Screen’, then ‘ Phone Control’, followed by ‘ Network Lock’, and finally, ‘Options’.
- In the Options menu, select ‘ Perso SHA256 OFF’.
- Now wait for about 30 seconds, and then press ‘Menu’ and select ‘Back’ to go back one step to the ‘ Network Lock’ screen.
- Once there, select ‘ NW Lock NV Data INITIALLIZE’.
- Wait for around one minute, and reboot your device.
(Courtesy of Addictive Tips)
After these steps have been completed, try inserting any foreign SIM into your phone and see if it detects signal or redirects you to another network.