Unlocking the Samsung smartphones on AT&T network carrier is not quite tough, and if we take smartphones of Samsung Galaxy Note series, especially Note 4, it is quite simple. But incorrect 5 methods will lock your Samsung Galaxy Note 4 on AT&T network permanently, so be careful by attempting the AT&T unlock.
Samsung Galaxy Note 4 – Brief Introduction
Let us give you a brief introduction of Samsung Galaxy Note 4, so that you may know what this smartphone is actually like. Just go through the introduction of Samsung Galaxy Note 4 and then follow the AT&T unlock method to unlock AT&T on Samsung Galaxy Note 4 free.
Samsung Galaxy Note 4
- Processor – 2.7 GHz Quad-Core Processor
- Display – 5.7 inch (143.9mm) Quad HD Super AMOLED (2560 x 1440)
- OS – Android 4.4 (KitKat)
- Camera – Primary : 16Mp Auto Focus camera, Secondary : 3.7Mp camera
Samsung Galaxy Note 4 free AT&T Unlock Hack
- Make sure your phone is up to date – Update your Samsung Galaxy Note 4 smartphone to the latest android, otherwise this trick willnot work and your Samsung Galaxy Note 4 might get locked.
- Open the dialer – Open the dialer and enter the following code – *#197328640#. A new menu will appear.
- Select  UMTS – From the new menu select the UMTS option
- Select  Perso SHA256 Off
A Week In Tech 2: Galaxy Note 4, Unlocking Phones Law, and More
By using this trick you can unlock your Samsung Galaxy Note 4 AT&T free and easy.