The second one charges for contact outside of appointment times after the first 15 or twenty minutes - it is in her initial blurb and I don't remember the exact amount because I never thought I would ever spend more than a minute or two on the phone with her and if I did, I would simply get a bill - no big deal. I think charging for the contact makes sense and is how I run my business (when I remember to write the time down). I think it makes things clearer for all parties to charge in 10ths of an hour.
Both of the ones I see use their cell phones for personal and work.