Pressing the link takes you to a new page where at the bottom, the truth is finally revealed. Reading the small print reveals the information that the company behind the survey is a marketing website that is not “affiliated” with T-Mobile. On that page is a button that says “Accept.” Don’t press it even if you feel pressured by the countdown timer on the page. And note that the October 1st deadline has already passed.
If you are a T-Mobile customer and have received this spam, you should forward it to T-Mobile at 7726.