Problem: China mobile microax X222 mic not working problem, Mic point damage problem.
Solution: Mic problem can be solved by changing mic, Mostly china mobiles use universal mic same size and shape. If problem not solved by changing mic then this is motherboard fault. Check each point related mic on motherboard and apply jumper like diagram below.
Micromax x222 Mic Not Working Solution
Micromax x222 Mic Problem Solution