1. Power on the phone without a sim card
  2. Install the drivers kc02us_setup_x86_3.1.3.msi / kc02us_setup_x64_3.1.3.msi
  3. Dial ##3424# and when prompted for the MSL code enter 6 times 0 (000000)
  4. Select DIAG from the options and choose ENABLE
  5. IN AMDO.exe go to SERVICE tab and press "Scan ports" then select the diagnostic port.
  6. Press DO JOB button and follow the software instructions.
  7. After unlocking power off the phone, insert SIM and phone must be unlocked