Thanks for the reply, I tried 3 usb trutte formatted fat32, downloaded firmware 4 times but the result is always the same.Kinda runs better on app loading and call answering.
New feature that I noticed is ability to adjust waze volume individual to other apps like youtube music.
The usb drive must be Fat32 formatted. If you cannot install v3 over what you have, try installing v1 first.
the firmware and this 8667Q 军 灿 UI02- 国外 -VHD720x1280_v13_20220510