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[T-Priority](https://www.t-mobile.com/t-priority) - [SuperMobile](https://www.t-mobile.com/business/plans/supermobile) [](https://www.t-mobile.com) ## Got questions about 3rd line FREE offer? - ## What is 3rd Line Free or Discounted 3rd Line? New business mobile customers activating on an eligible voice plan, including Business Unlimited Select, Business Unlimited Advanced, Business Unlimited Ultimate, Business Unlimited Ultimate+, Go5G Business and Go5G Business Plus plan (lines 1-12), can get their 3rd voice line FREE. New customers activating on Go5G Business Next can get their 3rd line discounted to just $10 (with AutoPay & eligible payment method). - ## Which business phone plans are eligible for 3rd Line Free or Discounted 3rd Line? The following business cell phone plans are eligible: Business Unlimited Select, Business Unlimited Advanced, Business Unlimited Ultimate, Business Unlimited Ultimate+, Go5G Business and Go5G Business Plus plan (lines 1-12). New customers activating on Go5G Business Next can get their 3rd line discounted to just $10 (with AutoPay & eligible payment method). - ## How long will promotional pricing last? You can keep the promotional pricing as long as you maintain an eligible business cell phone plan. On Go5G Business Next, you must also be enrolled in AutoPay with an eligible payment method to maintain the $10 price point. - ## What do I need to know about 3rd Line Free or Discounted 3rd Line? To qualify for a free or discounted voice line, you must: - Activate a new account with at least 3 voice lines on an eligible rate plan. - 3rd Line Free: Business Unlimited Select, Business Unlimited Advanced, Business Unlimited Ultimate, Business Unlimited Ultimate+, Go5G Business and Go5G Business Plus. - Discounted 3rd Line: Go5G Business Next. - The bill credit will be applied monthly to the eligible line. - Customers on business cellular plans with additional taxes and fees will receive credits for the monthly service price of their line but will be responsible for all applicable taxes and fees. - Your new lines must remain active to continue receiving bill credits. - A maximum of 1 free or discounted line may be added per account for this promotion. - You can keep the promotional pricing as long as you maintain an eligible rate plan. - ## Does my free line or discounted line need to be a voice line or can it be an internet business phone line (VoIP)? Your free or discounted line must be a voice line. Other line types are not eligible for this promotion. - ## How many free or discounted lines can I get with this promotion? This offer has a maximum of one free or discounted voice line per account. - ## Am I required to use AutoPay? You’re not required to use AutoPay, but you’ll get a monthly discount on select business mobile plans if you sign up for AutoPay with an eligible payment method. AutoPay is not required to receive the promotion. On Go5G Business Next, you will need to sign up for AutoPay with an eligible payment method to get the discounted line for $10 (via $30 bill credit and $5 AutoPay discount). If you do not wish to sign up for AutoPay with an eligible payment method, your discounted line on Go5G Next will be $15 per month (via $30 monthly bill credit). - ## When will my promotion be applied? In most cases, you’ll see your promotional credits on your first bill. - ## Can I get this deal in addition to T-Mobile’s other promotions? Yes, you may combine this offer with most other promotions, including device promotions. Talk to us to ensure you meet the requirements for both promotions. This promotion cannot be combined with other free or discounted voice line offers. - ## Can I get the discount on Enterprise, Military, or First Responder plans? No, this promotion is only available with qualifying regular-rate voice plans. ## Follow T-Mobile for Business - [LinkedIn](https://www.linkedin.com/showcase/t-mobile-business/?INTNAV=fNav%3ALinkedIn) - [Facebook](https://www.facebook.com/Tmobileforbusiness/) - [X](https://twitter.com/TMobileBusiness/) - [YouTube](https://www.youtube.com/@t-mobileforbusiness) ### Choose language - [English](https://www.t-mobile.com) - [Español](https://www.t-mobile.com) - ## Contact a Business Care Expert Contact a Business Care Expert - [Call 1-800-375-1126](tel:) - [Contact an Expert](https://www.t-mobile.com/business/b2b-contact-information) - ## Self-service Business Care Self-service Business Care - [My account log in](https://tfb.t-mobile.com/?INTNAV=fNav%3AMyAccountLogin) - [Online support site](https://www.t-mobile.com/support/business) - ## Plans Plans - [Business phone plans](https://www.t-mobile.com/business/wireless-business-plans) - [International coverage](https://www.t-mobile.com/business/international-coverage) - [Small Business Internet](https://www.t-mobile.com/business/solutions/business-internet-services/small-business-internet) - [Business Internet](https://www.t-mobile.com/business/solutions/business-internet-services/business-internet) - ## Resources Resources - [Reasons to switch](https://www.t-mobile.com/business/reasons-switch-t-mobile-business) - [DIGITS](https://www.t-mobile.com/business/solutions/digits) - [Merger benefits](https://www.t-mobile.com/business/t-mobile-sprint-merger-benefits) - [Events](https://www.t-mobile.com/business/t-mobile-events-webinars) - ## Segments & Industries Segments & Industries - [Small/Medium businesses](https://www.t-mobile.com/business/small-midsize-business) - [Enterprise](https://www.t-mobile.com/business/enterprise) - [Government](https://www.t-mobile.com/business/government) - [Public safety](https://www.t-mobile.com/business/government/public-safety) - [Education](https://www.t-mobile.com/business/education) - [Libraries](https://www.t-mobile.com/business/industry-solutions/libraries) - ## More from T-Mobile More from T-Mobile - [Wholesale](https://t-mobile.com/wholesale?INTNAV=fNav%3AWholesale) - [Consumer wireless](https://www.t-mobile.com/) - [T-Mobile Partners Program](https://www.t-mobile.com/business/partner-recruitment) - [T-Mobile Partner Portal](https://businesspartners.t-mobile.com?INTNAV=fNav%3AT-MobilePartnerPortal) [![T-Mobile](https://www.t-mobile.com/content/dam/t-mobile/ntm/branding/logos/corporate/tmo-logo-white-v4.svg)](https://www.t-mobile.com/) - [Instagram](https://www.instagram.com/tmobile/) - [Facebook](https://www.facebook.com/Tmobileforbusiness/) - [X](https://twitter.com/TMobileBusiness/) - [YouTube](https://www.youtube.com/@t-mobileforbusiness) - [About](https://www.t-mobile.com/about-us) - [Investor relations](https://investor.t-mobile.com/investors/default.aspx?INTNAV=fNav%3AInvestorRelations) - [Press](https://www.t-mobile.com/news) - [Careers](https://www.t-mobile.com/careers) - [Deutsche Telekom](https://www.telekom.com/en?INTNAV=fNav%3ADeutscheTelekom) - [Puerto Rico](https://www.t-mobilepr.com/?INTNAV=fNav%3APuertoRico) - [Privacy notice](https://www.t-mobile.com/privacy-center/our-practices/privacy-policy) - [Trust Center](https://security.t-mobile.com/?INTNAV=fNav%3ATrustCenter) - [Privacy Center](https://www.t-mobile.com/privacy-center) - [Consumer information](https://www.t-mobile.com/responsibility/consumer-info) - [Public safety/911](https://www.t-mobile.com/responsibility/consumer-info/safety/9-1-1) - [Terms & conditions](https://www.t-mobile.com/responsibility/legal/terms-and-conditions) - [Terms of use](https://www.t-mobile.com/responsibility/consumer-info/policies/terms-of-use) - [Accessibility](https://www.t-mobile.com/responsibility/consumer-info/accessibility-policy) - [Open Internet](https://www.t-mobile.com/responsibility/consumer-info/policies/internet-service) - [Do Not Sell or Share My Personal Information](https://www.t-mobile.com) - [Licenses & Patents](https://www.t-mobile.com/responsibility/legal/licenses-and-patents) - This site is protected by reCAPTCHA. - [Instagram](https://www.instagram.com/tmobile/) - [Facebook](https://www.facebook.com/Tmobileforbusiness/) - [X](https://twitter.com/TMobileBusiness/) - [YouTube](https://www.youtube.com/@t-mobileforbusiness) © 2026 T‑Mobile USA, Inc.