My phone worked like a champ before the 4.3 update. All my problems started with the 4.3 update which killed the battery life, Apps started freezing, the phone became laggy and slow overall. I had hoped the 4.3.1 update would solve the issues, but it only helped marginally. The battery life is better, but still don't think it is at the pre 4.3 level. The home button is very flaky, sometimes it wakes up the phone, other times it does not. And the phone itself is slow, everything is laggy and animations for the apps opening/closing, moving between home screens is still very 'unsmooth', reminds me of what the 4.X update did to my iPhone 3G. Is this enough reason for a genius to replace my phone? It is very frustrating.