T-Mobile still offers a 1GB + 200MB 4G LTE Data Plan through the rest of the year for free when you add a tablet to your voice plan. (It's free after a $10 credit; you can bring a tablet in or buy one.) Don't have a tablet? T-Mobile is discounting a selection of LTE tablets to the same price as their WiFi counterparts. That's the best combo offer we've seen for tablets from T-Mobile. The available tablets, with prices for the lowest-level storage models: