In your life it may happen so that you face the decision – either to go on talking with someone without recording your conversion, or vice versa, to record it in order to protect yourself. Actually, there are a lot of reasons why you may want to record your communications.
One more reason to record your phone calls is simply an easy way to remember what you were said and what you replied. Often people forget all those small details that were expressed on the phone, so recording may be the most convenient way to remember and reproduce what was said.