can you take out the iPhone's sim card and use wifi outside of america? I'm traveling overseas and I wish I had a regular iPod touch so that I can just use WiFi to check emails without paying a roaming fee. I have an iPhone with an AT&amp;T sim card. I was wondering if I could remove the sim card and turn it into an iPod touch without having to pay a roaming fee? Does the phone still know it belongs to me even without the sim card?
gentmatt's answer is correct, however if you don't need to make phone calls at all you can also just turn on airplane mode. I have done this many times abroad. Turn on airplane mode in settings, then turn wifi back on. Your cellular signal stays off.