My son is in the Florence FCI in Colorado. He can't use the phone right now and I called and they said he could only have video visits. Why would that be?

We are only guessing, but it sounds like in might be in disciplinary segregation, also known as the SHU. The Special Housing Unit is isolated from the general population. Inmates are put in the SHU for various reasons, none of them particularly positive sorry to say. He will be allowed incoming mail, magazines, photos, books... but limited commissary and phone