I'm going to give it a shot... It's going to cut my bill in more than half from what I would be paying switching to AT&T Next. For that price, I'm willing to give up some coverage. (Hopefully I won't regret that). I'm hoping the new low frequency band will make things better. Plus, there's just so many other features going for Tmobile with their worldwide text / data, flight texting, etc. I believe I'm going to go with Jump - I did the price comparison to buying an iPhone every year, then selling it again. After tax, it seems like it would most likely be a wash if not cost me a little more. It would be a little bit of a gamble to know how much I would be able to sell my previous iPhone for. With Jump, if I have a defective iPhone (something wrong with it that was not my doing), will they replace it?