1. Start SPDTool and go 'DIAG MODE'

2. Select the model

3. From the 'Operations Box' select 'IMEI / BT / Relock'

4. From there select 'SLOCK' and put value to 'ON'

5. Connect the phone and wait for the operation to complete

6. Check 'Remove SIM_LOCK' connect the phoen and unlock it using the displaied code