It depends on the facility, the security level and any restrictions imposed on your inmate. The federal system allows calling from 6am - 9:30pm but restrict their minutes to 300 per month. County jails usually have the phones open all day and night, some even have phones in the cell. State prisons have a wide range of options and the main determinant is the restriction on each inmate. Some can only call once a day and others have none whatsoever.
https://www.inmateaid.com/ask-the-inmate/how-often-can-an-inmate-make-phone-calls.amp#answer
Accepted Answer Date Created: March 20,2015