T-Mobile Micro SIM Card Activation Kit - New Buying an unlocked, compatible phone or tablet? This Complete SIM Kit allows you to choose a plan and connet to T-Mobile?s Nationwide 4G LTE network. Punch out the ready-to-use Nano SIM (and if needed, the Standard or Micro SIM , slip it into your phone or tablet, and you?re ready to go Use any T-Mobile or comptible GSM unlocked phone or tablet With T-Mobile: No annual contracts, overages or credit checks