I would suggest a hard reset to wipe the phone and just keep it bare for a day or so to see if the problems come back. If they dont start putting things on one by one to see if you find one that causes it to go to downhill. I would also make sure that you have it set up to close programs completely when you "x" out of them and not just esentially minimize them. Although the phone has a good amount of memory, too many programs running will definitely cause it to freeze up.