Hi guys! Most of you probably know about Sprint's new $50 unlimited plan and the iphone for life deal. I have been a ATT user for awhile now, everything was great until I moved to Seattle. ATT LTE is SO slow here! I know Sprint has lower coverage in the nation compare to ATT. I checked out my friends Sprint 5c, it was so much faster. So my question is, Can I get a Sprint Iphone 6 at first, then later if I do not like their service, maybe I can unlock the phone and switch back to ATT? Thanks a lot guys!