Beginning November 24 as part of its Black Friday Weekend Sale, T-Mobile will offer an Apple iPhone 7 / 7 Plus 32GB Smartphone, Samsung Galaxy S7 / S7 Edge 32GB Android Smartphone, or LG V20 64GB Android Smartphone for free when you trade in a qualified last-generation smartphone and use your new smartphone on an eligible T-Mobile service plan. (You'll receive 24 monthly bill credits to cover the cost of the phone, although you must pay sales tax.) That's the best trade-in offer we've seen from T-Mobile this year; we saw a similar deal in September, but that was for the iPhone 7 only. Older trade-ins are subject to additional fees, click these links for exact iPhone, Samsung, and LG trade-in prices. Deal ends November 27.

Not a current T-Mobile customer? Combined with the deal above, you'll get a $200 Prepaid MasterCard for free for every number you switch to T-Mobile. (It's valid for up to 12 lines, up to $2,400 total.) Better still, through November 26, T-Mobile is offering an hour of Gogo In-Flight WiFi for free to everyone, even AT&T, Verizon, and Sprint customers who don't plan to switch to T-Mobile.