2019 Best Summer 3rd Line on Us

For a limited time, new customers activating 3 lines and single line customers adding 2 lines will receive one line free (via monthly bill credits) when they choose a qualified Magenta Plus plan.


Offer is not available for existing customers with more than 1 paid Voice line.



Get this deal


When is this deal available?

June 21, 2019 – TBD

Where can I get this deal?

You can get this deal by visiting the nearest T-Mobile retail location, ordering online, or contacting us to place your order.

What do I need to do?
New customers
  • Activate 3 new qualifying voice lines on a qualifying Magenta Plus plan during the promo period.


Existing customers

  • Have 1 postpaid Voice line of service.
  • Have or switch to a qualifying Magenta Plus plan.
  • Activate two new qualifying voice 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.
  • 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 Magenta Plus voice lines and the lines activated during the promotional period to keep your credit.
  • Limit of 1 redemption (1 free voice line) per account
  • Credit for voice lines applies to basic plan charge; Any line add-ons will be your responsibility to pay (such as PlusUp 30GB of hotspot).
  • Some Magenta Plus plans, like Magenta Plus Unlimited 55+, T-Mobile Amplified, Magenta Plus Military plans, and T-Mobile Essentials 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.