I've encountered some weirdness with my month-old LG optimus. After dialing a number, the screen goes black and all controls freeze. I am unable to turn it off or anything. The call goes through, but I am unable to end the call. After 20 mins or more the cell illuminates once again and I can do anything... except that function.
I've removed the battery twice, but sporadically (more oft than not) it would continue to happen. This resulted in a damaged cell phone case, so I left it off.
I haven't had an issue since; is this some sort of goofy coincidence.. or what??

Thanks for your time

 

...For example do these cell phones overheat?