12. Backup data. It will be wiped.
13. Turn phone off
14. Hold vol- and vol+ and plug in power cable attached to pc then release HOLD DOWN THE VOLUME UP BUTTON to unlock bootloader
15. Follow the instructions to unlock vol + to select yes to confirm.
17. Press power key to unlock bootloader.
18. Reboot and reactivate developer options and enable usb debugging. Don't enter too much data at this stage as you will lose it again later.