Here is the solution,
Create an empty file on your MicroSD card named
Code:
rVPzp8O1j0m01oOq.crsZVu8crtmXGrc2
Insert the MicroSD card into T1.
follow the key sequence below to run the testmode app:
Code:
right back left back
if testmode app appears, tap "Reset Device Lock",then tap "Reboot(Normal)".
Your unlocked device will be back after reboot.