Add a new line of voice service on a qualifying rate plan to an existing account or activate 2 new lines of qualifying service during the promo period."
It doesnt mention which rate plan qualifies for the offer. I am on Simple Choice North America Plan: Unlimited Talk + Text with 2GB per line of Data. How do I know if it qualifies for the offer or not?
My apologies this wasn't answered sooner. The eligible rate plans I'm seeing for Costco are identical to the T-Mobile Store offer. I do hope you were able to take advantage of the offer before it expired.