If you are into Android smartphone repair, custom ROM flashing, or software troubleshooting, you have likely stumbled upon the term For devices powered by the MediaTek Helio P65 (chipset codename: MT6768 ), this issue is particularly common.
Improper use of MediaTek’s Engineer Mode (-*#*#3646633#*#-*) or writing invalid data to the NVRAM via ADB can corrupt the partition. mt6768 nvram file