Has anyone had trouble with the screen not staying on. The phone is on but the screen stays black. If I hit the power button it will flash on the off. Problems since the recent upgrade. . Then I also get the 1x instead of the 4g. Any suggestions be

[oceanside]

Has anyone had trouble with the screen not staying on.   The phone is on but the screen stays black.  If I hit the power button it will flash on then off.  I have had problems since the recent upgrade. .   Then I also get the 1x instead of the 4g.  Any suggestions before I  visit the store.?  thank you