i replaced my bv8000 pro by a bv 9000 pro FHD and i have a problem: navigation bar is not working !!! make reset and flash ... but the problem persist .

hello,
have you tried to get into the recovery mode to reset the whole system and settings?

Yes try all : recovery, reset, flash, nothing works... I'm technicien from another brand... Seem to be touchpad defect...

ok.
i've known your problem here. i had reported to the tech support team.
please wait for our reply.
i will reply you before 28th March.
thx.

what is the version of your phone?
did the problem come out suddenly?
or did you disassemble your phone before?

no disassembly
problem was always here
BV9000PRO FHD VO 20180104

what is your firmware version?

VO 20180104