Hello and thank you for asking your question, with JustAnswer.com/Mac.
I am Sr. Mac Tech Support Specialist, Terry, glad to assist you.
What you can do, in order to resolve this issue, is start by resetting your iPhone
(Note: this does not remove any settings, data or media you have installed in your device
• To perform a hard reset, press and hold your Sleep and Home Menu buttons for approximately 10 seconds.
• Once your screen goes black, release both keys. (If you see a white Apple logo before you release the keys you have held the keys to long and will need to start the reset process once again
• The next screens you should see after the black screen, is the Apple logo screen followed by the main screen.
Hopefully this will get your iPhone back up to normal functionality.
Let me know if this helps.
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