Hello!

I'm having trouble with my tablet M7S Multilaser quad core , every time he turns off returns to factory settings.
So I plan to reinstall the ROM (firmware - i don't know) i don't know no Program Ubuntu for this .
help me if you know any ubuntu program and How to Find ROM and Install it in Correct Way

Thank You!!!

I didn't find the right solution from the Internet.
References
https://forum.xda-developers.com/general/help/rom-...
Field Management Video