Add a line to your account.

Two women in a car looking at a phone

Get the most out of your plan when you add a line for friends and family. The more lines you add, the less you pay per line.

Buy a new phone.

Shop for a new phone, see your phone plan cost, and check out device protection.

A magenta outline of a smartphone, with short lines radiating out around it

Bring a phone.

First, see if the phone is compatible with our network. Then, get a T‑Mobile SIM card, and view your new plan cost.

A magenta outline of a hand holding a smartphone

Connect a smartwatch.

Shop for a new wearable, add an eligible line, and add device protection.

A magenta outline of a smartphone, a tablet, and a wearable

Save more when you trade in a phone.

First, find out how much the trade-in is worth. Then, purchase a new phone and send us your trade-in. You'll get money back that can go toward your monthly bill.

Here’s the monthly cost when you add a line to your plan.

  Essentials
Up to 6 lines
Magenta®
Up to 12 lines
Magenta® MAX
Up to 12 lines
First line $60/mo.
Plus taxes & fees
$70/mo.
Taxes & fees included
$85/mo.
Taxes & fees included
Add a line +$30/line/mo.
Plus taxes & fees
+$50/line/mo.
Taxes & fees included
+$55/line/mo.
Taxes & fees included
Additional lines (3-8)
(Maximum 6 lines for Essentials)
+$15/line/mo.
Plus taxes & fees
+$20/line/mo.
Taxes & fees included
+$30/line/mo.
Taxes & fees included

AutoPay discount requires bank account or debit card, up to 8 lines, otherwise $5/mo per line. For Essentials, Monthly Regulatory Programs (RPF) & Telco Recovery Fee (TRF) totaling $3.49 per voice line ($0.50 for RPF & $2.99 for TRF) and $1.40 per data only line ($0.12 for RPF & $1.28 for TRF) applies; taxes/fees approx. 4-38% of bill. For Magenta® and Magenta® MAX , sales tax & regulatory fees included in monthly service price. See in-store materials for specifics in your state. Want more than 8 lines? Contact us.

Take the next step.

Add a line in person.

Manage online activity with FamilyMode®

Got Questions?

Who can add a person or device to a new line?

At T-Mobile, support is available, when you need it, how you need it: through our website, our app, via call, chat, or visit to your local store. Our customer support team, including your Team of Experts, is ready to assist with all levels of your support needs.

Customer Care representatives are available daily from 4 a.m. to Midnight PT, with your Team of Experts being available between the hours of 7am to 9pm local time.

If you are calling our customer support team from a phone other than your T-Mobile phone, call our toll-free number (1-800-937-8997) and enter your T-Mobile phone number when prompted.

How do I add a line to my T-Mobile Account?

Your Team of Experts is available between the hours of 7 a.m. and 9 p.m. local time. Simply dial 611 from your T-Mobile phone, or use two-way messaging on MyT-Mobile.com, via the T-Mobile App, or iMessage through Apple Business Chat. When you call customer support, we’ll first try to connect you with your Team of Experts, but you may be connected to another care support team to assist you as we want to make sure you get help as fast as possible.

How many lines can you add on T-Mobile?

Not a penny. Team of Experts is included for free for all T-Mobile postpaid accounts as part of your customer support team.

What does adding a line mean?

Adding a line means you are adding another line of voice or mobile internet service with a new phone number to your current T-Mobile account.

Does T-Mobile give free phones for new lines?

We always have great offers for customers looking to add new lines to their account. Follow this link to see our current offers: https://www.t-mobile.com/switch/free-cell-phone-with-plan

What is a SIM card?

The SIM card, including a Nano SIM card with micro- and standard-SIM adapters, is how your phone gets its assigned phone number. The card works with an unlocked, T-Mobile compatible GSM phone. There is no SIM card activation required. Once you receive your SIM card in the mail, simply slip it into your phone and you're ready to go. To activate your device, dial 1 (800) 937-8997 from a separate phone to contact T-Mobile customer service.

Will the T-Mobile SIM card work in any device?

Absolutely. All T-Mobile for Business customers are assigned to a Team of Experts.

How do I check if I can bring my phone to T-Mobile and be added to someone’s account?

Yes. Team of Experts is available in Spanish and there is a Team of Experts assigned to the Puerto Rico region.

How do I check if I can keep the phone number I already have from another carrier? How would that work if I’m bringing my own device and being added to someone’s account?

Your Team of Experts is assigned based on your regional area. This lets us build expertise based on that area's specific needs. If you're not happy with your Team of Experts, let us know and we'll work with you to resolve the issue.

Is it safe to transfer my number online?

Yes. T-Mobile's online checkout has been verified by VeriSign. The information you submit is encrypted to provide the highest level of security before it's transmitted to T-Mobile.

How long will it take to transfer my phone number to T-Mobile?

The SIM card, including a Nano SIM card with micro- and standard-SIM adapters, is how your phone gets its assigned phone number. The card works with an unlocked, T-Mobile compatible GSM phone. There is no SIM card activation required. Once you receive your SIM card in the mail, simply slip it into your phone and you're ready to go. To activate your device, dial 1 (800) 937-8997 from a separate phone to contact T-Mobile customer service.

Can I bring other devices like tablets, laptops, watches, and hotspots to T-Mobile?

Yes, if your device uses technology that’s compatible with the T-Mobile network. Refer to the device manufacturer’s website for details. If you have questions, take your device to the nearest T-Mobile store, message us on this page, or call us at 1-800-937-8997.