• 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 its customers. If you missed the last free line promo, another one is now rolling out. However, the big catch with the promo is that customers are being selected randomly for the free line, presuming they fulfill some basic conditions.

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