All Tmobile promos have an end date you just need to look at the fine print.

You just need to wait for a new offer. I’m on the 55+ plan and around every Christmas I get an offer for a free line.

yeah i didnt read the fine print. said it only lasted a week and then later i learned i could do it over the phone since i was going to activate an old phone for my daughter. i didn't even have to go in for an in person appointment like the stupid email said.

how many lines do you have on your plane Gramps?

Just 2. I really don’t need anymore.

When we added a line for a niece she never paid and used up all her allotted minutes in the first week so she finally left the plan after a couple of months and we had to hold onto that line for 2 years so we didn’t get charged an ETF. This was before unlimited text and talk .