[hovatek]

Havent used another PC yet.
No custom ROM was ever flashed on the phone.

try using another PC. ensure to uninstall then re-install vcom drivers using https://forum.hovatek.com/thread-440.html
if it persists then you'll need to get access to a working H7

[Keslar]

That's a mismatch error.

Sent from my Samsung S5 using Hovatek mobile

Yes, it is.

Sent from my Infinix X510 using Hovatek mobile