How to deal with my phone phobia?

I have social anxiety... It's not completely debilitating but makes life extremely difficult for me. I'm fairly comfortable phoning up close friends and relatives but outside of that my anxiety levels go through the roof... I even have panic attacks when my phone starts ringing and I'm too scared to check my text inbox... Which has over 20 unread messages right now. I cry if I have to make a phone call. This is all making it really difficult for me to apply for some job vacancies. What should I do?