i recently managed to flash gsi using fastboot instruction:

fastboot flash system system-quack-arm-aonly-vanilla.img

from https://github.com/phhusson/treble_experimentations/releases/tag/v213

they don't have twrp for my device so i had to use fastboot.

i wanted to know

how do i flash the gapps img. file (or how can i get gapps?)

and how do i fix ussd and phone calling function which does not work?

everything else works perfectly


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