Most phone problems can be fixed by following these simple steps
This won’t affect your data or contacts.
On some phones, such as the Nokia N8, the battery can’t be taken out: just turn off your phone, wait for 30 seconds and turn your phone on again.
Restore the original factory settings on your phone. For more on how to do this, see your phone’s user guide.
This won’t affect your data or contacts.
To get the best performance, your phone should be using the most up-to-date software. Check the latest software updates for your phone.
Remember to back up your contacts and data before updating your software. For more on how to back up, see your phone’s user guide.
If you have tried these steps and your phone is still not working, you can: