What does this do?
Is it just a sim to put in the phone, but you still need to sign up for a regular Tmobile plan? Is a sim normally more than a penny?
This isn't a new line just the physical SIM which usually costs $10.
Just note, that it's prepaid and most people, including you, want/need postpaid, as prepaid doesn't have Global service. This SIM cannot be used for postpaid.