Is it okay to ask a provider is she is GFE on the phone?

unless you provide a definition. if the definition involves specifc menu items for service that might indicate entrapment.

if her reviews and advertising don't paint a clear picture it might not be a pretty one.

you research her reviews.....

99% of the time all the questions you need answered are on a ladies website and/or within in her reviews. I personally will not answer any questions over the phone. Unless of course i have a good long standing friendship with you.

You ask "Are you a GFE?" and she says "Why yes I am!"  Can you now tell me exactly what you can expect when you see her?  No.  She has no idea what your definition of GFE is and you have no idea what her definition is.  The term GFE is meaningless because different hobbyists ascribe different meanings to it.  And most providers use it as a marketing tool.  A lot of the better reviewed ladies don't even use the term any more because it has no universal meaning.  Unless you go through your personal GFE checklist and confirm that a lady is offering everything on that list, you may still be disappointed.  And good luck getting a provider to have an explicit discussion on the phone about the specific services she will provide you.  You are better off looking at reviews to see if your expectations will be met.

It's better to ask them on email than phone...

JMO

She has a website.  She should have reviews.  Please READ her website.  

Like Mea said, I too do not answer questions over the phone or in emails.  I direct everyone to my website and reviews.  If you cannot figure it out from there, I don't know what to tell you.