Here is the Stock Firmware Download And Update Instruction special for Geekbuying Flying 5i itemcode:  313423

Download the Flash tool and the firmware then uncompress them.

Flash tool download link: https://www.dropbox.com/s/ufsxsob74vn87s6/SP_Flash_Tool_v3.1220.01.rar

Firmware download link:  https://www.dropbox.com/s/lraqi35yib15vjp/159499%20%20Flying%205i.rar

1. Open the Smart Phone Flash Tool,

Open the exe tool as pic shows:

2:  Click “Scatter-loading” :

Click it.

and choose the firmware which named “MT6577_Android_scatter_emmc.txt”

3. Click the “Firmware-Upgrade” button.

4: Turn off your Star N9776, and connect it to your pc with data USB cable now.

All set!! Just wait the progress bar reach to the end and “OK” jump out.