https://www.cnet.com/news/black-friday-2018-phone-deals-free-oneplus-6t-now-lg-v30-plus-430-moto-g6-200-thanksgiving-sales/

Also see Black Friday deals specifically for the iPhone XS, XR and iPhone X, the Galaxy S9 and Note 9, the Pixel 3 and 3 XL and T-Mobile's Black Friday promotions.

If you already have one or more phone lines through T-Mobile and add another and trade in an old phone, the carrier will give you a new OnePlus 6T phone to use for the additional line. This is one of our favorite phones for 2018 for its excellent performance for the price. A price of "free" is even better.