Question for all you S4GRU gurus out there: So I'm on Sprint using a Galaxy S3, and my contract is up this month. Can't say I'm terribly satisfied with the service at the moment (I'm in midtown), though I've read here that if you aren't using a tri-band device, your service will be terrible anyway. So, what do you think? Would it be worth upgrading to a new tri-band phone and re-instating my contract? Will I get to keep my unlimited data plan for the same price? Thanks!