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How to add a line to your AT&T Wireless phone plan

Learn how to add a line to your AT&T phone plan, including costs, benefits, and deals.

Adding an extra line to your AT&T account is an easy and cost-effective way to allow another person to be part of your wireless plan. You can add a family member, friend, or other users, who can then use the plan’s services. Did you know adding a line can even help you save money? AT&T plans may offer multi-line discounts when you add multiple lines so it’s a win-win for everyone on your plan.

If you’re thinking “When would I need to add a line to my phone plan”, this video shows you just some of our favorite examples of when to add a line to your AT&T account:

Add a new line to your plan

Whether it’s friends or family, it’s always good to stay connected.

  • Flexible pricing with AT&T Unlimited Your Way​®
  • Free shipping and flexible returns​
  • Same-day pick-up at your local AT&T store

How much does AT&T charge for one additional line?

How much does it cost to add a line to AT&T? In short, adding a new line can cost as low as $30 per line, depending on the plan and features you select. When adding a line, customers may also be eligible for deals like free phones, bill credits, and multi-line discounts.

a man looking at phone and smiling

How many lines can I add to my AT&T plan? 

You can have up to ten lines total and save $10 per month on every line when you sign up for both eligible AutoPay and paperless billing with your debit card or bank account.

AT&T lets you choose an unlimited plan to fit each person on your account. You can mix & match from three unlimited data plans: AT&T Unlimited Starter® SL, AT&T Unlimited Extra® EL and AT&T Unlimited Premium® PL. In general, adding a new voice line can cost as low as $3599 per line when you have more than four lines. The price per line tends to go down as you add more lines. You can even add wearables like smartwatches for as little as $10 a month as additional lines on your account. More lines equals more savings.

AT&T may temporarily slow data speeds if the network is busy.

Does AT&T have add-a-line deals?

We sure do! When you connect your own device, you’ll earn $250 in bill credits and keep the phone you love. You can even hold on to your same phone number. If your device is currently active with another carrier, see if you can keep your number when it’s transferred to your AT&T plan

If you’re shopping for a new device, AT&T has great deals on new phones when you add a line. Save up to $1,000 with a phone that fits your style and budget. You can even order online and pick up that shiny new phone in-store so you can have it in your hands the same day. 
 

Can I add another phone to my AT&T plan?
You can have up to ten devices on one AT&T wireless plan. With each line you can buy a new cellphone or bring your own device. 

If you bring your own phone, you’ll score some special deals too!

  • Consider doing the entire process on the AT&T website. When you sign up online, you’ll get rewarded with $250 in bill credits by bringing your own phone. 
  • You can even keep your same number. If your device is currently active with another carrier, you can see if you can keep your same number when you switch to AT&T.

What types of unlimited wireless plans does AT&T offer?

You have several unlimited plans from AT&T to choose from. You can add family and friends to your plan, buy a new device or bring your own. 

No matter which plan you choose, you’ll get features like unlimited talk & text in and between the U.S., Canada & Mexico, AT&T ActiveArmor® mobile security,1 a free app to block those annoying spam calls & more, and unlimited texting from the U.S. to 200+ countries.2 Learn more about how AT&T ActiveArmor helps keep your account safe

Can’t decide which new phone to buy? Take this five-question survey and we’ll help guide you toward a phone that fits your needs.

1Requires compatible device/service. Other terms and restr’s apply. Visit att.com/activearmorapp for details.

2Compatible phone and rate plan required. Includes unlimited messages up to 1MB in size within and from DCA, Mexico and Canada. 

Want to add a line to an AT&T Prepaid plan?

With AT&T Prepaid plans, everyone gets their own line, their own plan, and their own data.  

Save $15 monthly on every line when you add up to five lines in one convenient monthly payment through AutoPay. Check out the AT&T Prepaid plans

a man and baby looking at laptop and talking over phone

Steps to add a line to your existing AT&T mobile plan

Ready to add a line to your AT&T account? Follow these steps:

Step 1: Visit ATT.com and sign in to your account
Step 2: Select the Add a device option
Step 3: Decide if you’ll be connecting your own phone, or buying a new one from AT&T
Step 4: Pick the plan and features for your new line
Step 5: Set up and activate the new line on your AT&T wireless plan 
Step 6: If you purchased a new device, you can usually pick it up in-store the same day, or choose if you want to have it delivered 
 

Helpful tips

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Don’t forget to enroll in AutoPay to get your monthly discount

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Consider adding protection against damage or loss to keep your devices safe

Is your child ready for their first AT&T phone?

Kids are more connected than ever before. AT&T teamed up with the American Academy of Pediatrics to develop the ScreenReady Quiz. Take the quiz and learn if your child is ready for their first phone, and hear tips from the experts to help your family make safe and positive connections on all screens.
 

Pro tip

Don’t forget to add protection against damage or loss.  
(Luckily, you can pick which lines have a little extra protection—great news for those of us who’re a little on the clumsy side).

broken phone

Tips for monitoring data usage across multiple lines on one AT&T account

You can monitor your wireless data usage for every line on your AT&T wireless account. There’re several methods to choose from:

  • For a quick summary of data usage for the current month, call *DATA (*3282) from your AT&T wireless phone. You’ll get a free text message with your estimated remaining data usage and remaining balance. 
  • To dive deeper and view more details, sign in to your wireless AT&T account from your computer or the myAT&T app on your phone.
  • If you don’t yet have the app, get it for free by texting the word myATT to 556699 from your wireless device to manage features and see the data usage summary—including a breakdown of data usage by each device on your account.  

Learn more in this AT&T support article.
 

Conclusion

Adding a new line to your AT&T wireless plan is an easy, cost-effective, and convenient way to get the people who matter most in your life on the same wireless account. Same bill, one payment, multi-line discounts—there’re plenty of reasons to add a line.

If you’re ready to add a line to your AT&T account, get started.

More articles and information

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Author

Max Irzhak

Max Irzhak has spent his fourteen-year career leading creative strategy and crafting stories for global brands and ambitious startups. Passionate about cutting-edge technology and cybersecurity, he simplifies complex subjects into easy-to-understand, accessible content to help shoppers make informed decisions about the products that improve their lives. Max lives in the heart of New York City.