There is a blu line at the top of my screen after upgrading to iOS 8.3.  How can I get rid of it?

Why is there a blue line at the top of my screen after upgrade to iOS 8.3?

Try the basic troubleshooting:
Restart / Reset
http://support.apple.com/en-us/HT201559
Restore from backup
Restore as new
http://support.apple.com/en-us/HT201252

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