On this page at the bottom, in the "nitty-gritty" section:
5. The $15 base plan requires a Talk Booster add-on and sufficient anytime minutes in your account to use voice features.
From what I've read in the forums, when I setup a new prepaid $15 base plan and add a credit card, I get a 100 Minute Talk Booster Add-on for Free.
Do I still need to buy additional talk booster add-on or can I use this "free" talk booster add-on for my $15 base plan?