T-Mobile 4G No-Contract Hotspot with $25 Service Credit When you're awaiting an important email or the close of an online auction, sometimes the spirit is willing, but the signal is weak. Good thing you enlisted T-Mobile's handy hotspot. It offers 4G connectivity for up to 8 devices at once. Watch videos, play online games or stream your favorite music — anywhere. It's your own personal 4G portal to the wide world of the Web!