We do not know which facility you are referring to but there are no cell phones allowed in ANY penal facility. It is a new federal law that if they are found, the offender faces up to five additional years.
https://www.inmateaid.com/ask-the-inmate/i-know-that-my-brother-can-have-a-cell-phone-in-this-program-it-cant#answer
Accepted Answer Date Created: June 27,2016