A common troubleshooting step is resetting all of your apps to their factory defaults if you are having trouble with your device; your personal information will not be deleted.
1.
From the Home screen, tap Settings.
2.
Scroll to General.
3.
Tap General.
4.
Scroll to Reset.
5.
Tap Reset.
6.
Tap Reset All Settings.
7.
Tap Reset All Settings again.
8.
You've completed the steps!
