Get your other gadgets online
You can turn your phone into a hotspot for free and tether up to 10 other devices. Basically, that means that in a pinch or while on the road, you can turn your phone into a wireless router to get your laptop or tablet online.
Text and talk to friends across the border for free
Yep, you can conference call and exchange emojis with any pals in Mexico or Canada without being on the hook for extra charges.
Hang on to unused data
Most of T-Mobile's most popular plans come with Data Stash, which automatically rolls any of your unused data (up to 20GB) to the next month.
Text while you fly, for free
T-Mobile's partnership with Gogo allows its customers to text without paying for in-flight WiFi.
Binge Netflix, HBO, Hulu, and more for free
The new (and already somewhat beleaguered) BingeOn feature gives customers the ability to stream content from their favorite services without using any of the high-speed data counted in their plan (in other words, you can watch unlimited amounts of Netflix/HBOGO/Hulu at sub-4G LTE speeds for free).