Millet mobile phone MIUI system black screen screen does not respond to what to do

Millet 3/4 black screen screen does not respond to what to do

Reason One

Could be a problem with the proximity sensor, we can try to "enable distance sensor" in the phone to turn off, the specific steps in the "Settings"-"program"-"Telephone"-"listen to the status"-"Enable distance sensor"-"off" to try to see how it?

Reason Two

The photosensitive hole does not block when we call, leaves the ear to take off when on the screen, may try.

Reason Three

It is also possible that the sensor is blocked by the cell phone film, will be millet mobile phone 3 of the protective film to tear the good.

Reason Four

If the above method does not solve your problem, we can try to check the hardware to see.