Hello all! I have the opportunity to buy an iPhone 4 for a $90 that is in excellent condition. I guess I should start by saying I currently have a Lumia 520, and have a pay as I go 10c/minute phone plan with it. I don't talk hardly at all, and just use wifi for light browsing, and not much else. Everything else I own is Apple, and most of my friends use iPhones as well. I thought that using a 4 would still let me use FaceTime and iMessage (thus saving on my minutes) and then work better with my Apple eco-system. The phone I'm thinking of buying is still on iOS 6. Does this seem like a good idea? Does the 4 run iOS 7 decently enough for FaceTime/light browsing?