with an eligible trade-in, which can cover the full cost of a Pro model. They also have an "unusually good" promotion for the iPhone Air Go to product viewer dialog for this item.

Knowing this can help narrow down which carrier's specific "free line" or device promotion is best for you. Our Best Cell Phone Deals: iPhone, Samsung & More - Verizon

, making it free with a new unlimited line without needing a trade-in.

It is critical to understand that "free" is almost never immediate. It is usually a .

: You are essentially getting a 36-month loan. Each month, the carrier charges you for the phone and then applies a matching credit to your bill.

: While a specific BOGO for lines recently expired, they have historically offered deals where you can add a second line for the price of one. For the devices themselves, they offer up to $830 off the iPhone 17 series with a trade-in and a premium plan like Experience More Boost Mobile : Provides the