This is why I love android devices. A method has been taking the Android world by a storm to unlock Galaxy SIII and Galaxy Note II locked on Sim carriers without paying a single dime. The method is extremely simple to follow and you do not need to download anything or perform outrageous hack. All you have to do is enter a code from code menu and that’s it, no waiting for code, no paying for an unlock. While this method has worked for many, it is possible that it might not work on a few networks. So, without further to do, here is a step by step guide to Unlock your device.
This might void your warranty, proceed at your own risk. Hardwareinsight takes no responsibility of any broken devices
Step 1: Insert the desired sim you want to insert in your phone and restart it.
Step 2: Enter the code *#197328640# into the keypad and press send.
Step 3: Go to main menu, UMTS > Debug Screen > Phone Control > Network Lock > Options > Perso SHA256 OFF. After chossing this option, wait for around 30 seconds.
Step 4: After waiting on the screen in step 3 for 30 seconds, Go back one step by pressing the Menu button, select back, which should bring you to Network Lock, then choose  NW Lock NV Data INITIALLIZ.
Step 5: If you followed the steps correctly, you will now have an unlock galaxy phone.
Known Networks for which the method worked
- Rogers Galaxy Note II SGH-I317M
- T-Mobile’s Samsung GAalaxy S III
- TMobile UK LTE NOTE 2
- Note 2 EE
- Note 2 AT&T
- Videotron S3 SGH-t999V Canada
So, if you have a galaxy SIII or Note II, try this method and share your results with us.