Telephonophobia

Telephonophobia, in plain terms, means fear of telephones but it’s not the physical telephone that haunts. It includes fear of receiving or making a call. So, when it comes to make or receive a call, you get nervous and sweaty along with shivers. You avoid calls and ask others to do it for you.

Oh shit it's the boss on the phone, mate can you answer it and tell him I have food poisoning? (A real case of telephonophobia)