It's from my office and my boss is going to let me use it until I finish my assignment here in June 2014. I figure I can use it to read PDF's, browse the internet, listen to music, watch videos, but I'd like to know how I can get the most out of it. I've downloaded: 4.3.3 ipsw redsn0w But should I update it to 5.1.1? I always see people say they regret going from 4.3.3 to 5.1.1. I wanna test the limitations of it using Cydia apps and see what kind of utility and fun I can get out of it.