2018 Add One Line, Get One Line

-Offer no longer available-

For a limited time, get 2 additional lines for the price of 1 (after bill credits) when you pay for at least 2 voice lines with T-Mobile ONE ! That's 4 lines for $35 each, with taxes and fees included on AutoPay! That adds up to hundreds of dollars in savings each year.



Get this deal


When is this deal available?

February 10, 2018 - April 8, 2018

Where can I get this deal?

This offer is no longer available.

What do I need to do?
  • Pay for at least two postpaid voice lines of service.
  • Have or switch to a qualifying T-Mobile ONE plan.
  • Activate two new qualifying lines during the promo period
Get your credit

You'll receive text message confirmation once you're qualified for the deal, and your monthly credits will begin within two bill cycles after purchase. The credit will apply to the line with lowest monthly recurring charge activated during the promo period after all other discounts.


If you don't see a credit on your first bill, you'll see a double or make up credit on your second bill. Learn more about Promotional credits.

Anything else I should know?
  • You must keep your account in good standing with the lines active to receive your credit.
  • Limit of 1 redemption (1 free line) per account
  • For 1 year, you must maintain the same number of lines that are on your account when the promotion starts. If you cancel any line on your account within 1 year, you will lose your credit.
  • After 1 year, you must keep two paid T-Mobile ONE voice lines and the lines activated during the promotional period to keep your credit.
  • Credit for voice lines applies to basic plan charge; Any line add-ons will be your responsibility to pay (such as ONE Plus or ONE Plus International).
  • Some T-Mobile ONE plans like 2 lines for $100 plans and T-Mobile ONE Unlimited 55+ plans do not qualify for this deal.



Get help with this deal

Not seeing your credits on your account? No worries! We got you covered. It can take up to 2 bills before your credits apply to your account. If you're still not seeing your credits or received a notification from us that you're no longer eligible for this deal, check out Promotional credits for help.