If you are thinking of sending your phone for repair, check these easy steps first. They may fix the issue and save your time and effort.
Easy fix 1: Restart your phone
Press and hold the power key for at least 8 seconds. The phone switches off. To switch your phone on again, press and hold the power key until the phone vibrates.
Easy fix 2 : Charge your phone
Make sure you use a compatible USB charger to charge your phone.
First connect the USB cable to the charger, plug the charger into a wall outlet, then connect the micro-USB end of the USB cable to your phone.
When the battery is full, unplug the charger from the phone, then from the wall outlet.
Easy fix 3: Restore to factory settings
Before you restore your phone to factory settings, we recommend you to back up your contacts and other personal content.
Select: Settings and Phone > Phone management > Factory settings > Restore.
If prompted, enter the security code. After restoring the original settings, the phone switches off and then on again.