The Samsung Galaxy S25 Plus is widely available on contract with significant discounts and incentives from major US carriers and retailers. Leading deals currently offer the S25 Plus for free with eligible trade-in and a new activation on an unlimited plan at AT&T, Verizon, and T-Mobile[1][3]. T-Mobile also allows customers to get the device for free when adding a new line on the Go5G Next plan, or up to $800 off on a trade without the most expensive plan requirements[1].
Samsung itself is offering up to $700 off the S25 Plus with a trade-in, plus an extra $100 Samsung credit[3]. Verizon and AT&T will both include additional perks such as a Galaxy Watch or Galaxy Tab for $1/month when you opt for a qualifying contract[3]. Xfinity Mobile and Boost Mobile similarly provide the S25 Plus free (with trade-in and unlimited plan at Xfinity; around $6/mo on Boost’s Infinite Access unlimited plan, no trade required)[3][1][5].
For those who prefer a contract deal without a trade-in, Boost Mobile offers the S25 Plus alongside its unlimited plan at $65 per month, and includes a free future upgrade when available[1]. Google Fi is currently offering a $600 discount on the S25 Plus for new Unlimited Plus or Flexible plan customers, partly as an upfront discount and partly as bill credits over 24 months[5].
In summary, most contract deals for the Galaxy S25 Plus require either a trade-in, a new line, or both, typically combined with a 24-month unlimited plan contract. These deals are available directly from carriers, Samsung, and major retail partners.