AT&T Wireless Promo Codes: 20% Off in September 2026

Advertiser Disclosure: At Slickdeals, we work hard to find the best deals. Some products in our articles are from partners who may provide us with compensation, but this doesn’t change our opinions. Our editors strive to ensure that the information in this article is accurate as of the date published, but please keep in mind that offers can change. We encourage you to verify all terms and conditions of any product before you apply.

Cutting your phone bill might be easier than you think this month. AT&T is running strong offers across the board, whether you’re switching carriers, upgrading your phone or adding a line for the family.

Below, we’ve rounded up AT&T’s best wireless deals right now, from free phones to savings for students, teachers, military members and first responders. We’ll also walk you through how each one works and what you need to qualify.

Try AT&T Wireless Free for 30 Days

AT&T is letting new users try its network free for 30 days. There’s no credit card required to sign up, and you keep your current phone, number and service the whole time. The trial runs on an eSIM, so you can switch between AT&T and your existing service to compare speed, coverage and reliability without committing to a new provider.

The trial comes with generous perks:

• 100GB of data
• 25GB of personal hotspot data
• Unlimited talk and text across the U.S., Canada and Mexico
• Unlimited texting to more than 200 countries
• Full access to AT&T’s 5G network

Because you get the full 5G network for the entire 30 days, you’re testing the real product, not a stripped-down version.

To sign up, all you need is your own iPhone. It has to be unlocked and eSIM-capable, and if you want to test the 5G network, it needs to be 5G-capable, meaning an iPhone 12 or newer. Once you’ve confirmed your phone qualifies, create a profile and activate your trial eSIM through the AT&T app.

Android users can’t take advantage of this offer yet, but AT&T says support is coming soon.

Switch to AT&T and Get Up to $800 to Pay Off Your Old Phone

Switching from another carrier? AT&T will give you a Visa reward card worth up to $800 per line—on up to 10 lines—to help pay off what you still owe on your old phone. It’s one of the best switching deals around, especially for families moving several lines at once.

A few things to know:

• The card matches what you still owe, up to $800. If you owe less, you get less.
• To qualify, port your number to a new AT&T postpaid line. You also need to have been with your old carrier for at least 120 days.
• The card isn’t automatic. Upload your latest bill at att.com/switcherpayoff within 60 days of signing up, and the card arrives in eight to 10 weeks.
• If you cancel the line early, AT&T can take back some or all of the card’s value.

Get a New Phone for $0 With No Trade-In Required

You can get a new phone from AT&T for as little as $0 a month, and you don’t have to trade in your old one. Two phones are free right now, the Samsung Galaxy A17 5G and the flagship Galaxy S26, while everything else runs from about $3 to $16 a month.

The way it works is simple. You pay for the phone in 36 monthly installments, and AT&T gives you a credit each month to cover part or all of the cost. On the two free phones, that credit cancels your whole payment, so you pay nothing. On the rest, it just brings the monthly price down.

Before you sign up, keep two things in mind. You’ll need to keep your line active for all three years, because if you cancel early, the credits stop and you’ll owe whatever’s left on the phone. There’s also a $35 setup fee, plus taxes.

Get Up to $200 Off a New Line When You Order Online

Add a new phone line online and AT&T will take up to $200 off. The discount comes as a $5.56 credit on your bill each month for 36 months. Just note that you have to order online, not in a store or over the phone.

Here’s what you’ll need to qualify:

• One of AT&T’s monthly unlimited plans, starting at $75.99
• A phone you buy at full price, finance on a 0% APR installment plan, or one you already own

The credit applies to each line, so adding a few for your household multiplies the savings.

A couple of smaller things to know. The credits start within your first three bills, so you may not see the discount for a month or two. You’ll also want to avoid canceling any other line on your account within the first 90 days, since that can stop the credits.

Trade In Your Phone for Up to $1,100 Off the Galaxy S26+ or S26 Ultra

AT&T offers up to $1,100 off the Samsung Galaxy S26+ or Galaxy S26 Ultra when you trade in an eligible phone. The base Galaxy S26 is not included in this offer.

The discount is applied as monthly bill credits over 36 months. How much you save depends on the phone you trade in and which AT&T unlimited plan you have.

Higher-tier plans and newer trade-ins unlock larger credits.

• Up to $1,100 off: Newer Samsung phones (Galaxy S22+ and up) traded in on a mid-tier unlimited plan or higher
• Up to $900 off: Older Samsung phones (Galaxy S10 and up) traded in on a mid-tier unlimited plan or higher
• Up to $500 off: Galaxy S10 and up traded in on a lower-tier unlimited plan

Samsung phones qualify in any condition. iPhones, Google Pixels and other devices also qualify based on their trade-in value. A $35 activation or upgrade fee applies per line.

Bundle Wireless and Internet for $30 a Month, Plus a $200 Reward Card

Pair an eligible wireless plan with AT&T Fiber and you’ll get 1-GIG internet speed for $30 a month for your first 12 months. If you’re a new residential Fiber customer on 1-GIG or 5-GIG service, you can also earn a $200 reward card. Just remember to redeem it within 75 days of getting the reward notification, since it doesn’t arrive automatically.

Qualifying is flexible. New customers can sign up for both plans together, current wireless customers can add internet, and current internet customers can add wireless. Either way, you get AT&T coverage at home and on the go.

Save Up to 20% With AT&T’s Appreciation Discount

AT&T offers a recurring discount for people in public service roles.

The following groups are eligible:

• Military and veterans
• Retired law enforcement officers
• Retired firefighters
• Teachers
• First responders and public safety workers
• Eligible healthcare workers

The discount applies to all three AT&T unlimited phone plans:

• 20% off the Premium 2.0 plan
• 15% off the Extra 2.0 plan
• 10% off the Value 2.0 plan

Verify your eligibility on the AT&T appreciation portal to claim the discount. The savings appear as a bill credit within three billing cycles. You recertify once a year to keep the discount active.

Save 20% on AT&T Premium 2.0 With the Student Discount

College students can save 20% per line on AT&T’s Premium 2.0 plan. Note that this deal applies only to Premium 2.0, not the Extra or Value plans, and you may get extra perks on top depending on your school.

To claim it, verify your student status on the AT&T verification portal by entering some details about yourself and your school. Once you’re verified, the credit shows up within three billing cycles.

Editor’s Take

AT&T’s 30-day free trial is the standout offer here. No credit card, no commitment and full access to the 5G network make it one of the lowest-risk ways to test a carrier. You keep your current phone and service the entire time, so there is nothing to lose. If coverage and speed meet your expectations, the switching credit of up to $800 per line sweetens the move.

The trade-in deal on the Galaxy S26+ and S26 Ultra is competitive, but the 36-month installment commitment is worth weighing carefully. Up to $1,100 off is a strong discount, especially for newer Samsung trade-ins. The catch is that canceling early means losing the remaining credits and owing the balance on the phone. That same three-year lock-in applies to the $0 phone offers and the new line discount, so factor that into your decision before signing up.

The appreciation discount is easy to overlook, but it adds up fast for eligible households. A 20% recurring discount on the Premium 2.0 plan brings the price from $90 down to $72 a month per line. For a family of four, that is over $850 a year in savings. Teachers, military members, veterans, first responders and healthcare workers qualify, and verification takes just a few minutes.

AT&T Promo Code FAQs

Does AT&T offer free phones?

Yes. The Samsung Galaxy A17 5G and the Galaxy S26 are currently $0 a month after 36 monthly bill credits. You need an eligible unlimited plan and a three-year line commitment to get the full credit.

Do I need to trade in a phone to get AT&T’s $0 phone offer?

No. The current $0 phone offer does not require a trade-in. AT&T’s separate trade-in deal applies to the Galaxy S26+ and S26 Ultra and offers up to $1,100 off, but that is a different promotion.

Can I stack an AT&T Wireless promo code with trade-in credits or bill discounts?

It depends on the offer. Some promotions overlap, like the appreciation discount and a phone installment plan, while others have separate eligibility requirements. Check the terms on each deal before counting on stacking them.

Do AT&T’s promo codes work for existing customers, or just new ones?

It depends on the offer. The 30-day free trial and switching credit are for new customers only. The trade-in deal on the Galaxy S26+ and S26 Ultra is open to both new and existing customers. The bundling discount is also available to current wireless or internet customers adding the other service.

Does AT&T offer discounts for bundling internet and wireless services? 

Yes. Pair AT&T Fiber with an eligible wireless plan and get 1-GIG internet for $30 a month for your first 12 months. New residential Fiber customers on 1-GIG or 5-GIG service also earn a $200 reward card.

Does AT&T offer a military discount?

Yes. Military members and veterans get 20% off Premium 2.0, 15% off Extra 2.0 and 10% off Value 2.0 through the AT&T appreciation discount. Verify eligibility on the AT&T appreciation portal and the credit applies within three billing cycles.

Does AT&T offer a discount for teachers?

Yes. Teachers get the same appreciation discount as military members: 20% off Premium 2.0, 15% off Extra 2.0 and 10% off Value 2.0. Verify on the AT&T appreciation portal to claim it.

Does AT&T offer a student discount?

Yes. College students save 20% per line on the Premium 2.0 plan. The student discount applies only to Premium 2.0, not the Extra or Value plans. Verify your student status on the AT&T verification portal and the credit applies within three billing cycles.