I'm all for hating on Ajit, but from a cursory look at the prison case, the FCC just never really had the jurisdiction to regulate intrastate calls and repeatedly lost in court on that question. There was already a 50 cent cap on interstate calls under Pai, and this year under Rosenworcel it's been lowered to 14-21 cents[1].
Am I missing something?
[0] https://arstechnica.com/tech-policy/2020/07/ajit-pai-urges-s...
[1] https://www.prisonlegalnews.org/news/2021/sep/1/fcc-takes-fu...