Three steps will fix most problems on mobile: Reboot, Reset, Update.

Method 1 - Reboot your device
Switch off your  device(mobile)
Take the battery out
Wait 40 seconds
Put the battery back in, and turn on again

Your data and contacts are not affected by removing the battery.


Method 2  - Reset the settings
To restore your phone to its factory settings, follow the instructions in the guide that came with it.
setting- security setting- reset/restore setting-(sellect option)/ or press password/code and ok

See all Nokia user guides and other phone

Your data and contacts are not affected by restoring factory settings.

 Method 3  - Update the software
Some problems can be solved by updating your phone's software to the latest version.
by manufatur of  tecnition

                      byeeeeeeeeeeeeeeeeeeeeeeeeeeeeee