Hello I have a 10 month old iPhone 4 32gb. A friend of mine got the sgs2 and he hasn't opened it yet and he is willing to trade it for my iPhone 4. I'm reAlly confused! I know sgs2 has duAl core etc and of course is brand new but I hAve iPhone since launch and I am so used to it as bored as well! On the other hand, I dont use my iPhone 4 too much since I bought the iPad. Plus I hate the lag animation since 4.3.3 update. Anyone has made the change And is happy with sgs2???? Is the lag worse with ios5? Ps. I love the battery life of my iPhone.