Only the Primary Account Holder and those with Full Access to the account can add lines, and the account must be current. Ready to add a line or device to your account? Let us show you how. For T-Mobile for Business customers, contact Business Customer Service and we'll get you up and running. For Prepaid customers, use the Activate or change T-Mobile Prepaid service page.
Add a line with a new device
- Log-in 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.
- Select your device.
- Select your color, memory variant, and pricing option, and select Add to a new line.
- Make or review plan selections and select Add a new line.
- 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.
- Enter the trade-in device information, to find it dial *#06# to get your phone's IMEI, or find it in your device's settings, then select Continue.
- Provide information on the condition of your trade-in, then select Continue.
- Select Trade in this phone.
- Select Continue or select No, I’ll take my chances to opt out of insurance.
- Confirm your order details and pricing, then select Continue to shipping.
- Select your shipping method and review the address section. Edit the address if necessary, then select Continue to payment.
- Enter your payment details and check the Customer Agreement box to confirm consent of the T-Mobile Terms and Conditions, then select Accept & Continue.
- Sign your EIP Equipment Installment Plan agreement if you are financing your device with T-Mobile.
- Select Submit order.
Add a line with your own device
- Log-in 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.
- Select your device type.
- Select the option to bring your own device.
- Review plan selections and select Add a new line.
- Confirm your order details and pricing, then select Continue to shipping.
- Select your shipping method and review the address section. Edit the address if necessary, then select Continue to payment.
- Enter your payment details and check the Customer Agreement box to confirm consent of the T-Mobile Terms and Conditions, then select Accept & Continue.
- Select Submit order.
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