My 6 week old 16GB iPhone 3G has twice recently "lost" its activation upon power cycling. In other words, it came back on in emergency call only status, asking to be plugged in to iTunes and activated. Luckily, another power cycle fixed the issue both times. I'm just wondering how common this is, and if anyone thinks I need to be concerned about it enough to speak with Apple. This is my second 3G. The first one (same model) never did this, and I had it for 4 months. Everything else about the new phone is as perfect as the iPhone gets, and I'd hate to have to exchange it.