1. Get up to $1,000 off the Samsung Galaxy S25 range C. Scott Brown / Android AuthorityT-Mobile has some of the best deals on the There’s a range of promotions, depending on whether you’re trading in your old phone, whether you’re a new or existing customer, and which plan you’re on. The summary is that you can save as much as $1,000 if you’re switching up your old device or around $800 if you’re just adding a new line. For those adding a new line of service on the Experience More or Go5G Plus plans, you’ll get $800 off the latest Samsung flagships. That could land you the base model Galaxy S25 for free.If you’re an existing customer on the Experience Beyond or Go5G Next plans, trading in your old device can get you up to $1,000 in credit. This sounds fairly standard, but the old device you switch out can be one of several eligible devices and can be in any condition. If you’re more interested in the new , the same deals can land you the $1,100 handset for free.Other deals for adding various new lines or trade-ins outside the plans referenced above can also save you money on the hot new Galaxy handsets. Hit the button below to peruse them for yourself., Use our savings calculator to find out how you can switch and save on wireless and streaming versus AT&T and Verizon at T-Mobile.com/Switch. With 3 lines, including taxes, fees, plus optional streaming services where applicable. Our lowest cost to switch. Our biggest family savings., Below, you’ll find the best T-Mobile promotions currently available. Perhaps something in there can save you some money when you make your next smartphone, tablet, or smartwatch purchase..