I got my new iPhone 4 yesterday however when I first plugged it into iTunes it said there was no sim card inserted into the iPhone. I popped out the micro SD card and it was in there. So i took it out brushed it off and put it back in and the rest is history. Except today, it randomly just lost the connection to the sim card and I had to pop out the SIM card and put it back in again. Is this common or is it just a bad sim card I need to get replaced? I love the iPhone 4, but I don't really like having an expensive iPod touch when the SIM card goes out. Thanks.