Go to Mystar123.com to sign up online.
or you can Send a Text Message to 32075 with Keyword 5FREE
or you can go into a MetroPCS Authorized Dealer (service at metro is not required)

Sign up for *123 in 3 easy steps – No credit card or payment necessary!

**No Purchase necessary. Available to new users only. Limit One $5 MyStar123 card per customer; phone registration and/or email required.

https://www.mystar123.com/SignUp.aspx