Sprint is doomed
They combine Verizon-level arrogance with truly breath-taking incompetence into one slimy package. Their network stinks, it's the slowest of the Big Four (and not by a small margin, either), their customer service makes Comcast look good, and they actively hide their street address. For some reason corporate doesn't want the customers to be able to send them messages in writing. Finding it was... interesting... and once a letter is sent, don't expect a reply. i sent off a little note on the 29th December 2013. No reply as yet... I suspect that no-one even read it.
I'm holding until the iPhone 6 shows. Then I'll be off to TM, and get a nice shiny, cheap, iPhone 5c. And have TM pay my early termination fee. And buy my old phone off me. And Sprint can kiss my behind.