Hello, I have an iPhone 4 currently at Version 4.3.3 and firmware 4.10.01. I want to update it to iOS 5, but, I am wondering which one will be better, 5.0.1 or 5.1.1? Also, can someone give me step by step directions on how to upgrade to iOS 5, please. I am wishing to unlock the iPhone 4 for T-Mobile. I already have an Gevey SIM that works for the current version and firmware my iPhone is currently on. Will updating the version affect the Gevey SIM in anyway? Thank you. Much appreciated.