I own factory unlocked iPhone 4 and I want to upgrade from 4.1 to 5.1.1, but I'm afraid of losing data. What are the benefits of upgrading from 4.1 to 5.1.1? And about JB process, if I undarstend correctly: 1. I must backup my iPhone with iTunes. 2. Upgrade to 5.1.1 over iTunes. 3. JB using Absinthe. 4. Restore backup. The 4th step will restore my apps (Notemaster with all notes, FruitNinja, etc.), all contacts (phones, names, etc), camera pictures and music/video. Is this correct? And last: Is there serious risk of losing any data?