Depends on how the account is set up. If you set up a "one-number only" Service like InmateAid, only the calls you pay for will come to you.
https://www.inmateaid.com/ask-the-inmate/can-a-inmate-make-other-calls-from-the-friends-and-family-account-some-how#answer
Accepted Answer Date Created: June 13,2021