Only the Primary Account Holder and those with Full Access can add lines. If your account is current and you're ready to add a line or device to your account, let us show you how! Businesses with 21+ lines can contact Business Customer Service to get started.

Add a line with a new device

1. Log in to T-Mobile.com or the T-Mobile app.
   • In the T-Mobile app, select SHOP, and then Add a line.
   • On T-Mobile.com select Add a person or device to my account.
2. Select your device.
3. Select the device color, memory variant, and pricing option, then select Add to a new line.
4. Make or review plan selections and select Add a new line.
5. Select Yes, I want to trade in a device if you would like to trade in a device. Otherwise, select No thanks, skip trade-in.
6. Enter the trade-in device information, to find it, dial *#06# to get your device IMEI, or find it in your device's 'About' settings, then select Continue.
7. Provide information on the condition of your trade-in, then select Continue.
8. Select Trade in this phone.
9. Choose Continue or No, I’ll take my chances to opt out of insurance.
10. Confirm your order details and pricing, then select Continue to shipping.
11. Select your shipping method and review the address section. Edit the address if necessary, then select Continue to payment. A signature requirement is added to high-value orders to help protect against theft, some shipments may require a signature upon delivery. 
12. Enter your payment details and select the Customer Agreement to confirm consent to the T-Mobile Terms and Conditions, then select Accept & Continue.
13. Sign your EIP Equipment Installment Plan agreement if you are financing your device with T-Mobile.
14. Select Submit order.

Add a line with your own device

1. Log in to T-Mobile.com or the T-Mobile app.
   • In the T-Mobile app, select SHOP and then Add a line.
   • On T-Mobile.com select Add a person or device to my account in the “I want to…" section.
2. Select your device type.
3. Select the option to bring your own device.
4. Review plan selections and select Add a new line.
5. Confirm your order details and pricing, then select Continue to shipping.
6. Select your shipping method and review the address section. Update the address if necessary, then select Continue to payment.
7. Enter your payment details and select the Customer Agreement to confirm consent to the T-Mobile Terms and Conditions, then select Accept & Continue.
8. Select Submit order.