I know my calling's worth like phone card

from Wale – W.A.L.E.D.A.N.C.E. Lyrics on Rap Genius

Meaning

Wale knows rap is his calling and his talent is worth straight cash.

As usual Wale is making a sports reference as well mentioning Cris Collinsworth who played on the Bengals with Anthony Munoz, referenced in the previous line.

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