September 20, 2021

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The best T-Mobile deals of September 2021

The T-Mobile logo at MWC 2018.

T-Mobile is the second-largest wireless carrier in the United States, climbing up from third place after the merger with Sprint. Its growth is also thanks to the plentiful T-Mobile deals and offers available for new and current customers, with discounts on phones and other accessories.

Be sure to bookmark this page as we will update it regularly with new T-Mobile deals as they become available.

Featured deal: Save $1,000 on the Galaxy Z Fold 3 or Z Flip 

Samsung Galaxy Z T Mobile Deals

While not as expensive as the previous-gen Z fold was at launch, the Z Fold 3 is still an eye-watering $1,799.99 off the shelf. But trading in your current device can let you upgrade for as low as $799.99 ($1,000 off). The Z Flip 3 has a retail price of $999.99, so by trading, you can actually get it for free.

Check out the deal below, or find out what other T-Mobile deals are hot this month by scrolling on.

Best T-Mobile deals

Editor’s note: We will be updating this list of the best T-Mobile deals regularly as new promotions go live.


1. Trade in for a free iPhone 12 or cheap iPhone 12 Pro

iPhone 12 Pro display on table

David Imel / Android Authority

The savings you make vary depending on which phone you want and what you’ve got to trade in, but some of the discounts are pretty hefty. In order to receive this deal, you have to trade in an eligible device while also activating a Magenta Max line. Here’s a rundown of how much trading in your old device can save you:


2. Get up to $800 off a new Galaxy phone

Samsung Galaxy S21 Plus vs Galaxy S20 Plus vs Galaxy S20 FE

Robert Triggs / Android Authority

Samsung is a juggernaut in the world of mobile technology, producing premium smartphones that you can pick up now for significantly less than their initial retail value thanks to T-Mobile. There are plenty of savings to be had on Galaxy devices up to $800 off a new phone when you trade-in and start a new line.  

If something like the Galaxy Note 20 Ultra is more your style, T-Mobile is running a buy one, get $800 off a second one.

Here’s the full list of phones which are part of the Samsung promotion right now:


3. Get a phone for free when you switch

Moto G Play 2021 back of phone in hand

David Imel / Android Authority

You can get most of the top flagship phones on really solid discounts, but T-Mobile can also hook you up with a free phone just for signing up. This deal covers plenty of OEMs, and the choice is yours.

For example, if you sign up for a Magenta plan, you can grab Samsung’s brand new Galaxy A12 for nothing. All you have to do is trade in an old device — any device — and you’ll get 24 bill credits to hack away at your bill. Check out more of the options below:

  • Nord N200 5G — Free ($216 off)
  • Samsung Galaxy A12 — Free ($180 off)
  • Samsung Galaxy A11 — Free ($180 off)
  • Motorola Moto G Play — Free ($150 off)
  • T-Mobile REVVL V Plus 5G — Free ($168 off)

4. T-Mobile smartwatches deals

samsung galaxy watch 3 review all apps T-Mobile deals

Jimmy Westenberg / Android Authority

T-Mobile is currently offering a deal that’ll help you add a smartwatch to your wearable tech collection. You can pick up a Samsung Galaxy Watch Active 2 for free when you activate a paired Digits line. As usual, you need to buy the first device on installment over 24 months, and T-Mobile will give you credit over that time that totals the value of the Galaxy Watch Active 2.

Related: The best smartwatches of 2021

Samsung Galaxy Tab S7 in their cases

Eric Zeman / Android Authority

T-Mobile has a ton of great phones on offer, but there are some tablet deals too. Like the phone deals, some tablets are far cheaper if you activate a new line of service and T-Mobile is offering great deals on high-end tablets such as the Galaxy Tab A7 Lite, Apple iPad Air, and more.

Read more: The best Android tablets to spend your money on

Here’s the range of tablet deals available when you activate a new line with T-Mobile right now:


6. Add family members and save up to 50%

T-Mobile Family Deal

Having several different carriers and lines for each family member can get very confusing, especially with the number of plans available today. So, T-Mobile is trying to simplify things and help you save by offering up to 50% off when you add lines to qualifying family plans. 

Read more: T-Mobile buyer’s guide: plans, perks, and more

The family plans start at $30 per line and have tons of great benefits such as high-speed data, unlimited talk and text, and more. Check out the details of the deal using the button below.


7. Switch with no costs

T-Mobile Switch Deal

This deal also includes up to $650 in the form of a virtual prepaid card to help you pay off any costs that may come with changing carriers. If you’re looking to switch carriers, click on the link below to find out more details.


8. Other options on the T-Mobile network

If you’re looking for a great deal on the T-Mobile network that doesn’t necessarily have the T-Mobile name, you can also consider looking into an MVNO. An MVNO (Mobile Virtual Network Operator) is a third-party carrier that relies on a major network for coverage. Here are a few of the T-Mobile-based MVNOs that we recommend:


Those are all of the best T-Mobile deals at the moment. Stay tuned as we will update this page with more deals as they are announced.