Same here. I text back that I can't speak at the moment but text is ok. I answer the phone maybe 1 out of 10 calls, maybe not even that. I have a weird anxiety talking to new clients on the phone. However, if a regular rings me I am more than happy to answer.
My phobia started a long long time ago, when I was in a relationship with someone who didn't know what I was doing. I was obsessed that he'd found me and will ring me from a different number and recognise my voice. The guy is long gone, but my phobia not.

I'm the exact same iv never answered the phone to a client, I have it on my profile to only text me, but of course clients can't read so I still get about 20 odd calls a day.

I communicate exclusively by text and email for this very reason. I'm super-awkward and quiet on the phone, it just makes me shut down completely for some reason.

I used to be like that, and for the first months I'd only take bookings via e-mail, as I was always phone shy. But like sensualmilf said, it's hard to identify timewasters this way, and I was getting way too many no shows. Most of them were no shows, really.
I've since switched to phone, and although it was awkward at first, I definitely got much better at it, and after a few months it's not a problem anymore. I now get irritated at people texting me, with their stupid 'hi' and 'available?', just wasting time when they could just ring me and get done with it.

Bonus, I can now make phone calls in my private life without getting all nervous. And that is a huge plus for me.

I insist on talking to clients before they book.

How do you weed out TWs S?

You can tell a lot from texts lol, just as much as from talking to someone..
It's this weird phone-phobia I've had all my life, it's a pain in the arse, it's not just clients, it's everything and everyone!
Even my friends and family, I'd much rather text or message them on fb or whatever, I've no problem talking face to face
to people either, it's just the PHONE lol, I hate it 

And BTW, how DO you pronounce your name - it's bugging me lol?

Is it Shorsha - phonetically??   

I always insist on telephone calls, I absolutely hate texting full stop. I've got guys who've persisted in texting me for over a year and I haven't replied to them.
Its stated on my profile calls only.
It usually only takes a 30 second call for me to gauge a clients credibility.