This is Mione Q81 official firmware which you can use to un-brick or restore your smartphone to its default or factory state.
For instance, if you have previously rooted your phone or modified the system (or other) partition in any way, flashing this stock rom on your phone will overwrite all existing modified system files and replace with factory software.
If you have you have important data on the phone (like contacts, messages, app data, etc), please back them up because you could loose data after flashing.
Charge the phone to at least 30% so that the flashing process will not be interrupted by low battery. Interrupting the firmware installation means bricking your phone.
Download the firmware file from the link below and follow the recommended flashing instructions immediately after the download options. Please report any broken links discovered.
Download Options
File Name: Mione_Q81_SC7731_20170217_5.1_SPD.zip
Size: 466 MB
Link: Download
Flashing Instructions
After downloading the firmware from above link, extract the contents of the archive to an empty folder on your computer. Get a functional USB cable, then follow the instructions via this link to learn how to flash the firmware.
If you have any questions or other contribution please post in comments section for assistance.