EXPIRED: 3rd Line Service Promo with New Line (ID250736)

3rd Line Service Promo with New Line (ID250736) / SP149

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Get a 3rd line FREE

Customers get a free voice line (via monthly bill credits) when they activate a new account with 3 voice lines on a qualifying Essentials, Experience More, Experience Beyond, or New Business Performance plan. 

 

For existing customers, refer to Voice: Buy One, Get One Discounted with New Voice Lines

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Promo periodOctober 16, 2025 – January 7, 2026
RequirementsNew Account Activation or New Line Activation, Specific Rate Plan
Eligible customers

New customers only. (Existing customers: See Line Discount ID250739)

  • Postpaid
  • T-Mobile for Business 1-12 voice lines only (including Business w/ SSN)
  • Employee (T-Mobile, Non-TMO)
Limits1 redemption per account
PayoutBill Credit

What's the deal?

Eligible channels
  • Consumer Care
  • Retail (Company-owned, Costco, Sam's Club, and Authorized Retailer) including Retail Ship-To
  • National Retail (Walmart, Samsung.com, Apple)
  • T-Mobile for Business (Retail, Micro TEX, BTEX, eCommerce, Virtual Business Sales, SMB, Partner Solutions)
  • Virtual Retail
  • Digital (T-Mobile.com and T-Life app)

Device purchase

Not required

New line activation

3 new voice lines required

  • Lines added to the account via COR or BAN-to-BAN moves, conversion from NCC/SCNC to normal Postpaid, and lines resumed from cancel do not qualify for this requirement.
  • If a customer canceled a voice line within the past 90 days (excluding CORs and No Installs), the line must be resumed before they can add a brand-new voice line to qualify.

Rate Plan

Qualifying Essentials, Experience More, Experience Beyond,  or New Business Performance Plan (CoreMobile, ProMobile, and SuperMobile) required

Check the eligibility of the specific plan SOCs at the top of the page.

After the promo period ends, TFB customers already enrolled in the promotion may change to select 13+ line plans and keep the free or discounted line credit.

Important: Customers on the following plans are not eligible to be enrolled in the promo but can switch to these plans after the promo ends and keep the free or discounted line credit.

  • B25A7T1
  • B25A7T2
  • BUNL100T1
  • BUNL100T2
  • BUNL100T3
  • BUNL13T1
  • BUNL13T2
  • BUNL13T3
  • BUNLA14T1
  • BUNLA14T2
  • BUNLA14T3
  • BUNLA7T1
  • BUNLA7T2
  • BUNLA7T3
  • C25A10T1
  • C25A10T2
  • C25SA10T1
  • C25SA10T2
  • C25SXAXT1
  • C25SXAXT2
  • C25XVAXT1
  • C25XVAXT2

Port-in

Not required

Combinability

Not available for
  • Government accounts
  • Contractor / Dealer accounts
  • T-Mobile for Business 13+ voice line accounts 
  • T-Mobile for Business (SMB DE, Enterprise)
  • Military, First Responder, Unlimited 55, Promotional, and all other rate plans not included above.

Payout
  • Customers pay taxes and fees on the free/discounted line.
  • The free/discounted line bill credit starts within 2 bill cycles from activation.
  • Customers keep the credit for as long as they meet the promo requirements. 
  • Credit applies to the voice line charge only. Chargeable add-ons greater than $0 will be the customer’s responsibility to pay.

Paid lines required

Not required - new customers only

To keep this free line credit
  • After 1 year of enrollment, customers must keep at least 2 paid voice linesAND the free/discounted new line that was activated to enroll in this promo to continue to receive the credit.
  • No Install cancellations for voice lines will not impact the free/discounted line credits.

Review & take action

  1. Go over the promo details and these advisements with your customer so they understand what to do to get and keep this promo:

     Your credits should begin within your first bill cycle after activation, but in some cases, it may take up to 2 bill cycles to begin. If you don't see a credit on your first bill, don't worry. You'll see a double credit on your second bill.

    To keep the free/discounted line credit, you must keep at least 2 paid voice lines along with the new free or discounted voice line activated under this promo to keep the free/discounted line credit.

    If you cancel a voice line or change to an ineligible rate plan and lose your free or discounted line credits, you have 90 days to resume the canceled line or switch back to an eligible rate plan. You will not receive any credits that were missed.

  2. Confirm customer is on or changing to a qualifying rate plan.
  3. Help customers with their new account or new line activation.
     

T-Mobile for Business: Digital Checkout must be created and accepted within the promo period to qualify.

Having trouble?

Reminders

  • Customers can find the Promo code and Bill name and their free/discounted line credits on their bill statement.
  • You can see the credits in the Frontline Promo Dashboard and in Samson on the Discount screen.
  • The free/discounted line credits discount codes for this promo are 25Q44S, 25Q44Fand 25Q44P.
  • This promo is for a limited time only and subject to change and should be communicated to customers in this way.
  • This promo's Bill name changed from "Line Discount ID250736" > "3rd Line Service Promo with New Line (ID250736)."

FAQs

The free/discounted line credit applies to newly activated lines with logic this way:

  • AAL lines with subscriber-level MRC receive the credit first before lines that are included in a family/pooled plan MRC 
  • Lines with lowest MRC receive the credit
  • If multiple lines have same lowest MRC, lines with earliest activation date/time receive the credit

For more FAQs, see Talking Points: Promotions.

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