My 3G has been acting up for the past week. It seems to not like making calls or receiving any data from time to time (maybe 1-3 times a day for the last week). I won't know it's not working until I try to make a call, send a text, try to sync my email, or load a web page, etc. Once I notice that it's not working correctly I turn it off, then on again. About a second after the screen goes black (and this happens every time I have the problem) the phone comes back on without me actually turning it on again. It will ask for my passcode like normal, but about ten seconds after having been on, the loading indicator circle will pop up, the phone freezes, and it shuts off, regardless of whether I've started running an app or whatever else. Enter Genuis Bar: I took it to Apple yesterday and a genius took a look at it. He took it into the back and after about ten minutes came back and told me that everything looked normal except for that the Facebook app appears to be crashing in the background pretty often. He also mentioned that mine was the third iPhone in a row that he had seen with a Facebook crashing/eating up all my memory problem. He thought that the Facebook app could be what's causing all of the problems. So I uninstalled the Facebook app from the phone, deleted it from iTunes, and redownloaded/reinstalled. I haven't yet had that exact problem again; however, earlier today the phone was totally unresponsive for no particular reason. So what the heck is up with this thing? Anyone have the same problem?