What is MMS?
MMS stands for Multimedia Messaging Service. Whenever you send a text with an attached file, like a picture, video, emoji, or a website link, you’re sending an MMS.
A text message of up to 160 characters without an attached file is known as an SMS, which stands for Short Message Service.
With T-Mobile ONE™, you get unlimited talk, text, and data with unlimited 4G LTE in the U.S. and up to 5GB of 4G LTE in Mexico and Canada.
On all T-Mobile plans, during congestion, the small fraction of customers using >50GB/mo. may notice reduced speeds until next bill cycle due to data prioritization. Tethering at max 3G speeds.