Want to SIM Unlock your Samsung Galaxy Note II and Galaxy S III on stock Jelly Bean firmware? You can now do it for free through a simple hacking trick. Thanks to XDA member Owl74 who has discovered a loophole inside the Jelly Bean software and devised a method that unlocks the SIM slot for free.
To perform this hack on your SIM locked Galaxy Note 2 and S3, you need not be an expert. It is so simple that even a hard-core noob can easily do it. The method does not require the phone to be rooted or running custom ROM, but the device must be running Jelly Bean as it won’t work with Android 4.0.4 Ice Cream Sandwich. You need to be a little cautious before you perform this. You need to be sure that your Note 2 or S3 is really SIM locked. To check this insert a SIM card into your device from a different carrier/provider.
The SIM-unlock method described below has been found working flawlessly on following models:
- Galaxy S3 GT-I9300
- AT&T Galaxy S3
- Galaxy Note 2 GT-N7100
- Galaxy Note 2 GT-N7105
- AT&T Galaxy Note 2 SGH-I317
- Canadian Note 2 SGH-I317M (Rogers, Bell, Telus)
- T-Mobile USA Note 2
- Might work on other models too…
SIM Unlock Method:
Users from across the globe have successfully tried this hack and unlocked their phones without any issues. You can also try this on your phone by following the steps described below:
- Open your phone’s dialer and dial: *#197328640#
- This will launch a list of options.
- Select  UMTS >  Debug Screen >  Phone Control >  Network Lock > Options Perso SHA256 OFF >
- After choosing this option, wait about 30 seconds.
- Then go back one step by pressing the Menu button and then select Back.
- This will take you to  Network Lock options
- Choose  NW Lock NV Data INITIALLIZ …..
- Wait for a minute then reboot your phone.
Since the device does not notify whether the unlocking was successful or not, you will have to check it manually by inserting a SIM from a different carrier/provider.
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