Facing TV Problems? Ask a TV Technician.
This annoying problem may be caused by a software glitch.
If you haven't already done so, press and hold the power button and shut down the phone, then start it up again.
Let me know if the software reboot resolves the problem?
If that did not help, then the next step will be to reset the phone to its default factory settings - hopefully that resolves the issue.
Make sure you back up your information first.