https://www.cnet.com/news/cyber-monday-2018-iphone-deals-750-off-iphne-xs-free-iphone-xr-free-apple-watch-4/

T-Mobile is extending a different kind of gift to phone owners. When you activate a new account with a voice line and add a line of data, you can choose from one of these gadgets:

The discount comes in the form of 24 months of monthly bill credits.