Thursday, November 8, 2012

How to unlock Samsung Galaxy S3 T999 with Z3x box

The following is a guide to unlock the T-Mobile Samsung Galaxy S III with Z3X box. I have verified the steps below it worked for me. It's not easy to get it right because of lack of information available elsewhere. 

  1. Connect Z3X box to PC via USB.
  2. Enable USB debug on the phone.
  3. Dial *#7284# on the phone, choose Quadcomm USB settings -> DM + Modem + ADB
  4. Connect T-Mobile Samsung Galaxy S 3 T999 to PC via a different USB port.
  5. Select model T999 in samsung tool 13.1.
  6. Select the USB port and then click unlock. The phone will reboot itself after unlock is done.
  7. Congratulations, now you have just unlocked your T-Mobile Samsung Galaxy S3!

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

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

Posted by Huan at 2:39 AM

13 comments:

  1. UnknownNovember 16, 2012 at 2:48 AM

    I guess I haven’t read such unique material anywhere else online.
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  2. ZohaibDecember 18, 2012 at 3:27 AM

    thanks alot

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  4. P-InstintJanuary 11, 2013 at 4:21 PM

    Comment?

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  5. Unlock iphone easyJanuary 25, 2013 at 2:36 AM

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  6. AnonymousFebruary 12, 2013 at 1:00 AM

    thx bro

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  7. AnonymousFebruary 14, 2013 at 3:11 AM

    Good people good posting .a million thanks

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  9. UnknownJuly 20, 2013 at 10:34 AM

    You can use unlock code to unlock this samsung phone easily.It is best than using software.Get code from Superunlockcodes.com and unlock easily.

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  10. UnknownSeptember 12, 2013 at 9:13 PM

    I really love your write-ups guys continue the good work.
    Unlocked

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