If someone calls you, it is for a reason and common courtesy says: ‘If you call me, I will call you back’. Common courtesy? Yes. Common sense? Of course.
During your job search you are demonstrating to all those you communicate with your business skills and strengths. If you are not responsive to a simple phone call, what does that say about your ability to deal with and respond to ‘real’ life issues. The call might be a job opportunity, a job lead or a networking connection.
How long does it take to return a phone call and/or leave a message acknowledging receipt of the call?…Seconds. Don’t wait, do it right away.
Important people return phone calls…self important people don’t.
Your choice.