Go a step further and switch to Mint, T-mobile's pay-as-you-go subsidiary. I'm paying $180/year for a single line. I've been on mint for ~3 years now.

On Mint your traffic is routed with lower priority than T-Mobile's main customers. In practice, I have only experienced this at busy airports and an MLB game - where basically service dropped to near zero. This is in the Boston area. Obviously not ideal if you're in those conditions regularly. Otherwise it's been awesome.

If the service is of interest my referral code is below. It gets you a $15 renewal credit for joining. Will the winds of votes love or hate a referral code? Who knows! apologies if I'm out of bounds. (I don't understand why it's out of bounds)

[0] http://fbuy.me/vks2P