I just switched over from the iPhone 4. I'm not a newbie to Android, I actually had the first Verizon Android phone (Droid 1) back in the day and switched last year to AT&T because the Android experience for me back then was lacking. I've used an iPhone 4 for a year now and honestly loved it, but I've seen Android definitely picking up steam and becoming a much better operating system in the past year. I decided to switch back and I picked up the Infuse 4g. It's a really nice phone; I love the size and "4g" speeds, but reading about the Galaxy SII I realize how much better of a phone it is. Would it be worthwhile to purchase the GSM unlocked SII for use on AT&T's network? 4G will function correctly? I've never bought an unlocked phone and don't honestly know much about it. Would I be missing out on anything? I.E, would anything be disabled? Would I need the SIM from my Infuse to make it work? I have no problem hanging onto the Infuse and the SII. Once again, is this a recommended route to take (using an unlocked phone in general). Thanks!