Hi, I just bought an iPhone off of eBay and put the AT&T SIM card from my sony ericsson into the iPhone. However, I've been having some texting issues: it seems that some of my texts aren't being sent/I'm not getting some texts. Any ideas? Also, somewhat unrelated question: if I don't receive a text, would AT&T still count it on my bill? (I don't have unlimited) For example, if my phone is off and someone texts me - would they charge the moment I turn on my phone and get the text or the moment that someone sends the text and AT&T receives it? Thanks.