Unlock Bootloader:
1. Open command prompt
2. Type 'adb reboot bootloader'
3. Type 'fastboot oem unlock'
4. Use volume keys to select 'yes, unlock bootloader'
5. Use power button to select option
6. Done!
Lock Bootloader:
1. Open command prompt
2. Type 'adb reboot bootloader'
3. Type 'fastboot oem lock'
4. Done!
