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Joe Maring / Android Authority
TL;DR
- T-Mobile is rolling out a targeted “Line On Us” promotion to randomly selected customers.
- The free line is strictly a “Bring Your Own Device” (BYOD) arrangement and typically requires having at least two paid lines on the account, although additional requirements also likely apply.
- You can check eligibility by asking support to look for the “Loyalty BYOD Dec 2025” segment (ID25079) on your T-Mobile account.
T-Mobile frequently runs free line promos for…
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