The screen on the Xiaomi Mi3 goes blank after a call is initiated. It means that after placing a call the screen becomes blank or shuts down, thereby preventing the user to see if the receiver has attended the call, or to cut the call if it has been dialed to an incorrect number.
This problem can be resolved by disabling the Proximity Sensor option. To do this,
- Go to Menu – > Contacts – > Settings – > Incoming Call Settings – > Proximity Sensor – > and turn/shut it off.
Note: Also ensure that the plastic covering on the screen that came with the box is removed before the phone is used. This instruction is also mentioned in the manual.