Why do introverts not answer the phone or ring people back?

Because "we" cant stand people! That's why were introverts. Try a text msg.

Not always true. Anyone can not answer: maybe phone is on silent, phoned by unknown number!, busy as people have a life..job, school and other things. Some do phone back.

U should not judge someone and I think it is unfair to class all people who are something e.g. "introvert" as being "shy, tend to enjoy more time to themselves and other things" some may be true or a bit but maybe they want to make friends but find it difficult or people do not give them the time as some people can judge others and look down on them!

Some reasons are good not to phone back though especially if others do not phone back themself or don't pick up when u phone.

Goes two ways just like other things e.g. a story and more things.

Selfish bastards is why, it could be a emergency but they just don't give a ****. Introverts are so false, they pretend they're just "really quiet" but in truth they are the most selfish and lazy people around.

Because it gives us anxiety.

Edit: Depends who I'm talking to. I'm an introvert, so I wouldn't care much about 90% of the people in my life anyway. I honestly shouldn't be their first choice to call either.