How to Cancel AT&T in 2026

To cancel AT&T wireless service, call AT&T at 800.331.0500 or use the chat option in your account when it appears. In most states you cannot cancel wireless online. Only Illinois, Massachusetts, and New York accounts may cancel at att.com/signin, and only if you ordered that service online. The buried detail: AT&T does not prorate your final bill, so you pay for the whole billing cycle no matter what day you cancel.

Short answer: Call 800.331.0500 to cancel AT&T wireless. There is no self-serve cancel button for most people. Cancel close to the end of your bill cycle because the last month is not refunded, and if you have a device on installments, the remaining balance comes due.

Last updated: June 2026.

Where is the AT&T cancel button really?

For most AT&T wireless customers, there is no cancel button. AT&T does not let you end wireless service online in most states. You have to call 800.331.0500 or take the chat option when the account shows it. The exception is narrow: if you have an Illinois, Massachusetts, or New York account and you originally ordered that service online, you may be able to cancel at att.com/signin. Everyone else picks up the phone.

Here is the part that costs people money. AT&T does not prorate your final bill. Cancel on the first day of a new cycle and you still pay for that entire month. The service runs to the end of the period you paid for, but you get nothing back for the unused days. So the smart move is to cancel right before your next cycle starts, not right after it renews. Check your bill date first.

One more trap. If you bought a phone on an AT&T installment plan, the remaining balance on that device is not spread out after you cancel. It hits your next bill in full. Cancelling does not erase what you still owe on the hardware.

How do I cancel AT&T wireless service?

This is the standard path for a full account or a single line. Have your account number and the last four digits of the account holder's Social Security number ready.

1. Call AT&T at 800.331.0500, or sign in at att.com and open the chat option if it is offered for your account.
2. Tell them you want to cancel service or remove a line. Give your account number and verify your identity.
3. Expect a retention pitch. The rep may offer a discount, a plan change, or a credit to keep you. You do not have to accept anything. Repeat that you want to cancel.
4. Ask for your cancellation date and confirm whether any device installment balance or fee will appear on your final bill.
5. Get written confirmation. Ask for a confirmation number or email. Cancellation can take up to three business days to fully process.

If you signed up online in Illinois, Massachusetts, or New York, sign in at att.com/signin and look for the cancel option in your account instead of calling.

How do I keep my phone number when I cancel AT&T?

Do not cancel first. If you cancel the line before you move the number, the number is gone and you cannot get it back. To keep it, port it to your new carrier before you touch AT&T.

1. Set up service with your new carrier first and tell them you want to port in your existing number.
2. Give the new carrier your AT&T account number and any transfer PIN or passcode they ask for.
3. Once the port completes, the AT&T line cancels automatically. You usually do not need to call AT&T to close that line.

Porting is the clean way out. It moves your number and closes the AT&T line in one step, so you avoid the "did my cancel actually go through" limbo.

What about AT&T internet, fiber, or TV?

Different number, same billing reality. For AT&T internet or home phone, the general line is 800.288.2020. AT&T stopped giving prorated credits on internet and TV cancellations back in 2019, so you can use the service until the last day of your bill period, but you are not refunded for cancelling early. Return any leased equipment, like a gateway or receiver, by the deadline they give you or you can be charged a non-return fee. Ask exactly how and where to return it and keep the drop-off receipt.

When should I cancel to avoid the next charge?

Because there is no proration, timing is the whole game. Look up your billing cycle date in your account. Cancel a day or two before the next cycle renews, not after. If you wait until the day after renewal, you have just committed to paying for a full month you may not use. There is one softer spot: AT&T does not charge an early termination fee if you cancel within the first 14 days of new service. After that window, any device installment balance and the full final month are on you.

Can I dispute an AT&T charge after I cancel?

Yes, if the charge is wrong. If AT&T bills you after your confirmed cancellation date, charges a fee you were told you would not owe, or keeps billing a line you ported out, that is a billing error worth fighting. Start with AT&T using your confirmation number. If they will not fix it, read our guide on what to do when a company will not refund you, and if the charge is flat wrong, how to dispute a credit card charge with your bank. Terms change, so confirm the current cancellation and billing rules on AT&T's own site before you act.

How can Karen cancel AT&T for me?

If you would rather not sit through a retention call or chase a confirmation number, hand it to Karen. Karen is built to work cancellations, fight surprise charges, and keep pushing on your behalf. Tell Karen which account and what you want stopped, and Karen works the cancellation and goes after any disputed charge for you. Karen is a self-help tool, not a law firm, and does not give legal advice. Karen cannot guarantee a result, but Karen does the chasing so you do not have to.

For more walkthroughs, see the cancellation hub, or related carrier guides like canceling T-Mobile, canceling Verizon, and canceling DIRECTV.

Common questions

Can I cancel AT&T wireless online? In most states, no. You have to call 800.331.0500 or use chat. Only Illinois, Massachusetts, and New York accounts may cancel online at att.com/signin, and only if you ordered that service online.

Does AT&T prorate my final bill? No. AT&T does not prorate the final wireless bill. You pay for the entire billing cycle no matter what day you cancel, so cancel just before your next cycle renews to avoid paying for a month you will not use.

Will I owe an early termination fee? Only in some cases. There is no early termination fee if you cancel within the first 14 days of new service. After that, you will not owe an ETF for a completed commitment, but any remaining device installment balance becomes due, usually on your next bill.

How do I keep my phone number? Port it to your new carrier before you cancel AT&T. Start service with the new carrier and ask to port in your number. The AT&T line closes automatically once the port completes. If you cancel first, the number is lost.