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How to unlock your Galaxy Note II and some Galaxy S III versions for free (Jelly Bean req'd)

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How to unlock your Samsung Galaxy S III  and Galaxy Note II
Samsung seems to have a hidden menu in its Galaxy line, which allows you to carrier unlock your device for free, and appeared on an XDA-Devs thread submitted by user owl74. 

It is confirmed working at least with the two most prominent members of the Galaxy family this year - the Galaxy S III (but only some versions), and the trendy Galaxy Note II.

Your phone has to be running Android 4.1 Jelly Bean and above for the trick to work, though, and you can follow the steps below with the usual "do at your own risk" warning:

1. Enter the following into the dialler: *#197328640#
2. From the menu that appears choose 



Read the thread for which S III versions were successfully unlocked with this hidden menu function of Samsung, and try it out with a SIM card from another carrier to confirm. 

Users say the unlock is permanent and works even after full reset of your device, so you don't have to pony up for a carrier unlock, or use murky codes from eBay.

source: owl74 (XDA-Devs) via RedmondPie

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Samsung GALAXY Note II AT&T specs
Review
  • Display 5.5 inches 1280 x 720 pixels
  • Camera 8 MP (Single camera) 1.9 MP front
  • Hardware Samsung Exynos 4 Quad 2GB RAM
  • Storage 16GB, microSDXC
  • Battery 3100 mAh
  • OS Android 4.3
Samsung Galaxy S III T-Mobile specs
  • Display 4.8 inches 1280 x 720 pixels
  • Camera 8 MP (Single camera) 1.9 MP front
  • Hardware Qualcomm Snapdragon S4 Plus 2GB RAM
  • Storage 32GB, microSDXC
  • Battery 2100 mAh
  • OS Android 4.3 Samsung TouchWiz UI

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