The smartphone will shut down its Android user interface and restart into its bootloader interface.
Note: If "OEM Unlocking" is greyed out, connect to Wi-Fi and wait for the device to check in with Sharp's servers. If it remains greyed out, your specific carrier model may be permanently locked . Step 2: Enter Fastboot Mode Connect your phone to your PC via USB. Open a command prompt or terminal in your ADB folder.
Type the following command and accept the prompt on your phone: adb reboot bootloader
Return to the main page, select System , and open Developer Options . Locate the USB Debugging toggle switch and flip it to On . Locate the OEM Unlocking toggle switch and flip it to On .