I've found that sometimes [maybe 1 of 10] times I try and send a text my screen will start to slow [sluggish, only half my presses register] then it becomes unresponsive [none of my touches register].
The Home key still works but when I click to go back to the home pages the screen is still unresponsive.
This also happens when I leave my phone idle, for example, this morning I couldn't turn my alarm off. Or on several occasions I've missed phone calls because I couldn't slide the slider.
The fix: I press the power button to LOCK then I'll slide to unlock the phone. This bring the phone back.
Does anyone else have this problem? It happens while in SAFE MODE also. Should I get it replaced?