Flash Himax M3 M21i L107 using SP-FlashTool or Other MTK Tools.
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type file: ROM size: 1GB
Android Rom info:
platform: MT6737M, cpu abi: arm64-v8a
board: full_i6388, name: M21i
brand: Himax, model: M21i
build id: NRD90M, version: 7.0 Nougat (HIMAX-M21i_L107)
build description: full_i6388-user 7.0 NRD90M 1494558913 release-keys
Open FlashTools Folder, and Click on Flash_tool.exe
Select "scatter-Loading"and search MT6737M_Android_scatter.txt in ROM Folder
Select "Download Only"or if out notifications PMT changed for the ROM Please select upgrade "Firmware upgrade"
Turn off your phone, remove the battery (if the battery is removable)
Press “Download”button to start
Connect your phone into the computer via USB data cable.
The process will start and a red progress bar will appear after color purple, yellow.
Until there green circles display