It's too bad that the escorts on here responding find that "phone callers" are in their experience the biggest wastes of their time. But i see why.
Personally I would never call without given an explicit ok first from the escort.
This client prefers calls in advance to make sure (as best as possible) that there are not any expectations gaps, or misunderstandings or misrepresentations. At least for me, the purpose of the call is to make sure the escort is "real", we're mutually in sync, and 100% is trying to not waste either of our times if we did meet up and then discovered we weren't a good fit. The phone conversation is also very much intended ultimately to help them not waste more time later.
But i completely understand that real escorts who are on this forum and are true professionals would have this perspective because they know they are trustworthy, reliable and real but from the client's point of view we also have to find the chaff from the wheat of "time wasters" and i often feel that a professional won't mind a call (after establishing a few things over email or text) and the fakers or others who have people representing them are reluctant to speak.