I just got my Samsung Captivate yesterday from N1 Wireless. It is unlocked (going to use it on T-Mobile without data, wifi only) and came already updated to Gingerbread 2.3.5. This is my first smartphone (android or otherwise) so I don't have much of a frame of reference here. I spent a while this morning learning my way around the phone and have a big problem with it. At random intervals, often after just a minute or two of use, the phone becomes unresponsive, the screen goes black, and after a few seconds it goes to the lock screen. It appears to be rebooting without showing the (annoying) AT&T and Galaxy S animations. This is every couple minutes or less, making the device totally unusable. I have been researching the issue, and it looks like some people are experiencing similar phenomena after updating to GB. Does this sound like a software issue, or is this thing defective? I have just a few days to return it so I need to know soon what the best course of action is. I tried taking the battery out and back again to no avail. After doing some reading here I was considering a factory reset. Anyone have an alternative worth trying? I am reluctant to try rooting and flashing a custom ROM while I still have the option of returning it and buying something else, but I really wanted this sucker to work. It seems like a better fit for my needs than the Exhibit II that I was also considering.