Samsung I5503T Unlock With Z3x 100%

1: start without sim and type *#7284#
select usb

2: restart your phone

3: go to setting > application > development > select USB debugging

4: connect usb cable then select KIES mode

5: open Z3X Samsung tool ver 13.7 tool

and select SUMSANG android USB Diagnostic serial port on COM port
then just click UNLOCK.

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