After unlocking, reboot your device with fastboot reboot .
You usually pay a fee (approx. $20–$30) and connect your phone to a PC via USB. A technician then remotely accesses your computer to run a specialized tool that modifies the phone's configuration. bootloader unlock allowed no to yes
Or worse, you check the bootloader status directly and see the dreaded line: After unlocking, reboot your device with fastboot reboot
Restart the device and check the service menu ( *#*#7378423#*#* ) again to see if it flipped to . 2. Carrier SIM Unlocking bootloader unlock allowed no to yes