Save $10 a month; T-Mobile will upgrade your T-Mobile One plan to T-Mobile One Plus for $15 monthly
You might recall that when T-Mobile One was introduced last August, it offered subscribers unlimited everything as long as they were willing to view video at DVD resolution (480p). For some, this would be akin to watching hieroglyphics on the wall of a cave. So the carrier rushed out T-Mobile One Plus. For $25 a month extra, subscribers can request a 24 hour day pass allowing them to view streaming video in HD. This pass has to be requested every day since video reverts back to 480p once the pass expires.
For $25 a month, you can upgrade your T-Mobile One plan and convert it to a T-Mobile One Plus International. This includes everything that is offered with the T-Mobile One Plus plan, along with unlimited hotspot data. By allowing you to use your phone as a mobile hotspot, you can connect your laptop or tablet to a Wi-Fi signal. And with Stateside International Talk, you can make free unlimited calls from the U.S. to landlines in over 70 countries, and to mobile devices in over 30 countries.
Just yesterday, T-Mobile teased that it will be making its next Un-carrier announcement on January 5th during CES in Las Vegas.
source: T-Mobile
Things that are NOT allowed: