last resort is to factory reset and install gapps or you can install global rom which already come with gapps
i had the same problem on my mi4c so i never use china rom ever again..... very troublesome
Haiz... wasted alot of time looking for solutions.
Last resort..go back to the guy who brought in the phone.. see what he can do..
I thought i'm quite tech savvy.. but this one really makes me bang walls.
hahahah
