t mobile kids are free till 2012?

[synysterromance]

so t mobile has an ad saying kids are free until 2012? im trying to convince my brother to add me to his line so it would just be him and i on a family plan. can a family plan be 2 people?
im 16, so if he adds me does the ''free till 2012'' mean that when the bill comes, itll only charge for his phone line (and maybe some fees on mine), and nothing will be charged for me? cause that would be awesome. haha.
does age matter? i know ill still have to pay activation and small fees, and get a phone but i just want some clarification please
(and by me paying i mean him paying, since hes the one with the money lol)

 

[Unregistered]

Kids are free until 2012 = The phone line is free (No charge for the additional line.) If you use the web, there's a charge for it.. If your brother doesn't already have 2 lines, he isn't eligible for the offer in the first place. There's also charges for texting, etc.. And it uses minutes from the family plan (aside from calling other T-mobile phones.) In all honesty, the only thing "free" is the $10 fee that T-mobile usually wants in order to have an extra line on your family plan.