YMMV - received a targeted email. Seems like another Tmobile free line deal. Likely $10 for the SIM (unless you can get it waived).
Via monthly bill credits. Limited time offer; subject to change. Free new line for accounts with 2 to 11 voice lines; plus taxes & fees for accounts currently paying for a T‑Mobile wireless line with additional taxes & fees. Qualifying credit and Magenta, Essentials, ONE, or Simple Choice plan required. Credits may take up to 2 bill cycles; credits will stop if you cancel any lines. Limit 1 offer per account.
T‑Mobile and the magenta color are registered trademarks of Deutsche Telekom AG. ©2020 T‑Mobile USA, Inc
Similar to last weeks prior free line promotion, it depends on the rep and their familiarity with this additional free line promotion. If they are not familiar or say it is the same, end the conversation and try again with another rep that may be more knowledgeable.
Although I didnt take advantage of a phone promotion you should be able to combine with existing phone promotions that require to "add a line".
Once you get this free line promotion, please make sure to record/notate/screenshot any conversations incase there are any issues.
The last free deal had a cap of 8 lines on the One plan. This promotion allows up to 11 lines.
Again YMMV, as it was targeted to certain customers via email. May be worth calling and seeing if you got this promotion as well if you dont have or lost the email, if you want another free line.