T-Mobile Offer: Existing Single-line or New Customers: Get a 3rd Line
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Update: This popular deal is still currently available. T-Mobile offers Existing Single-line or New Customers a 3rd Line for Free (exclusions may apply) via Monthly Bill Credits. Note, qualifying credit and Essentials, Magenta or Magenta Plus plan required. Credits may take up to 2 bill cycles; credits will stop if you cancel any lines.

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