You have to set up a pre-paid account with the jail phone carrier if collect calls do not work.
https://www.inmateaid.com/ask-the-inmate/how-do-make-it-possible-for-someone-in-county-jail-to-make-a-phone-call-our-cell-phones-will-not-accept-a-collect-call#answer
Accepted Answer Date Created: February 08,2021