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T-MobileTrade In + New Line

Samsung Phone Promo with New Line

Promo Code: R621

$800$33/mo bill credit × 24 months

With 24 monthly bill credits when you upgrade and trade-in an eligible device on ProMobile. For well-qualified customers; plus tax & $35 device connection charge.

At a Glance
CustomerPersonal (Consumer)
ActionTrade In + New Line
Plan required$80/mo+ plan (Go5G Plus, Go5G Next, Experience Beyond)
Trade-inRequired — eligible device (see tiers below)
Port-inNot required
New lineNot required
📋
First time trading in with T-Mobile? Before you commit, make sure your old phone will pass inspection — cracked screens, water damage, and active anti-theft locks are the most common reasons trade-ins get rejected or downgraded. Read the Trade-In Checklist →
Terms & Conditions

Contact us before cancelling entire account to continue remaining bill credits, or credits stop & balance on required finance agreement is due: (e.g., $899.99 – Samsung Galaxy S26 5G 128GB). Bill credits end if you pay off device early. Tax on pre-credit price due at sale. Limited-time; subject to change. Qualifying business account, credit, qualifying upgrade ($80+/mo. plan…

Show full terms ↓

Contact us before cancelling entire account to continue remaining bill credits, or credits stop & balance on required finance agreement is due: (e.g., $899.99 – Samsung Galaxy S26 5G 128GB). Bill credits end if you pay off device early. Tax on pre-credit price due at sale. Limited-time; subject to change. Qualifying business account, credit, qualifying upgrade ($80+/mo. plan w/AutoPay; plus taxes & fees), & trade-in (e.g., $800: S25+; $400: S9+) required. Up to $800 via bill credits; lines on promo must be active and in good standing to receive credits; allow 2 bill cycles. May not be combinable with some offers, discounts, or promotions. Save up to $800 on select devices

Eligible Phones

  • Samsung Galaxy S26 5G

2 Credit Tiers

$800 off with Trade-in + New Line

$33/mo × 24 months via bill credits

Qualifying Plans

Go5G PlusGo5G NextExperience Beyond
  • Trade in an eligible device

Eligible Trade-In Devices

  • S25+

$400 off with Trade-in + New Line

$17/mo × 24 months via bill credits

Qualifying Plans

Go5G PlusGo5G NextExperience Beyond
  • Trade in an eligible device

Eligible Trade-In Devices

  • S9+

How to Claim

Save up to $800 on select devices

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