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Help Screen Problem

The notification bar at the top of the screen has disappeared and I now have 7 boxes showing code, e.g. P:0/1, dX:-5.8,dY:-5.6 etc. Also, when I tap an icon I get a blue cross-hair shown on the screen and when I swipe a screen it leaves a blue trail mark. Any ideas what is causing this.​
 
Looks like you got into system menus (either through the app or a dialer).

You SHOULD be able to press and HOLD the power key and bottom volume key for 10 seconds to force the phone to reboot and it should resolve it.
 
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