I only have one friend around here and she's not a phone person. I'm not a huge phone person either so it works out

If she ever calls me, it's because I didn't check my text messages fast enough and she REALLY needs to get a hold of me.
No other friends really call me. Everyone is more into texting or chatting on chat programs. If they do happen to call though, I don't avoid their phone calls.
I too avoid numbers that I don't recognize. If it's important, they will leave a message and I will get back to them.