I have called RingCentral Support several times and have received different answers. I have an employee who has been working in-house and now is going to be on the road. She will exclusively be using her mobile device. First, how do I disconnect her from the hard phone that we had in the office? Next, I have hired a new person (receptionist) that I want to assign this phone to. She will need to receive and make calls, but will not need any of the mobile tools. Do I still need to buy another user line? Can I just buy her a phone number and assign it to the phone? Even better, can I just assign her an extension and assign the extension to that phone? In any of these cases, how do I unassigned my traveling person and assign the new person to the phone?