The Situation that May Cause the Touch Screen Not Working
1.The phone is always touched with the magnet matters like your bank card etc.So please keep your phone far away from the magnetic field.
2.The phone is often at the high or low temperature that is easy to get an unresponsive touch screen. So do not let your phone in that situation.
3.The phone crash can be led to the unresponsive screen.
First do not worry, try to update its system or try to restore it to the factory setting to see whether it with the same situation.
4.App problems may cause phone touch screen not working.Just like this situation,there are many apps that occupied large number of storage,which caused the phone system unaffordable to operate.Or some apps are incompatibe with touch screen phones.
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