Monday, July 16, 2012

How to unlock Samsung Galaxy Note I717 with Z3X box

The following is a guide to unlock the Samsung Galaxy Note LTE with Z3X box. I have verified the steps below on Android 2.3.6 (not rooted) and it worked for me. It's not easy to get it right because of lack of information available elsewhere. 

  1. Connect AT&T Samsung Galaxy S Note LTE to Z3X box with the RJ45 C3300K cable
  2. Dial *#7284# on the phone and select modem for USB
  3. Dial *#9090# and select USB (1)
  4. Reboot the phone
  5. Select I727 in the Samsung Tool 12.1 drop down as i717 is not available
  6. There may be more than one diagnostic ports show up in Samsung Tool 12.1. So try them one by one. One of them will be able to readinfo and unlock. 
  7. Congratulations, now you have just unlocked your AT&T Samsung Galaxy Note !

To verify whether it's unlocked or not, just pop in a sim card from another carrier (for example, t-mobile), and reboot the phone. If the phone is not unlocked, it will prompt you for unlock code upon startup. 


  • It does not require the phone to be rooted
  • It works on 2.3.6 Android. I also tried 4.0.3 and it did not work.
  • It works on Samsung Tool 12.1. Samsung tool 12.2, 12.3, 12.5 may have issues showing its unlocked but in fact it's not.
  • If *#9090# code does not work then try the following: 1) power off the phone 2) connect microuart cable and power on the phone 3) now try *#9090# code again it must work 4) select USB diag and reboot the phone


Does it work for you? Please leave a comment if this helped you unlock your phone.


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