I'm in a little dilemma. I used iPhones until the Nexus One came out and I've been using android ever since. I have the Galaxy S2 unlocked for a few months now and really like the device. What are your thoughts of the 4S vs GS2? I NEVER used an iPhone 4, only up to the 3GS. When I switched to android, iOS didn't have notifications, Google Voice, etc. I rely heavily on things like Google Contacts, Calendar and Google Voice. How is Google Voice on the iPhone? Is it integrated well enough? I'm considering getting the 4s since I have an upgrade available. But I'm afraid of the android apps I paid for basically losing that money if I switch BACK to iOS. But I think the camera may be better on the 4S. The notifications are something that i LOVE from Android and so I guess the new ones in iOS 5 are the same.