Hi,
Sorry for the late reply due to the National Day.
The factory technician said, if you just flash the ROM and make the unit back to Android 4.4, after flash back to Android 5.1, it could not make the hardware key mixed. The only possible situation is that you also flash other mcu file.
Please tell us what kind of the mcu version on your unit.
Once we get the MTCB-KLD 4-V2.94 mcu file next Monday, we will send it to you.
Regards
Statistics: Posted by Jammy — Fri Oct 07, 2016 9:50 am