Method: Use a friends phone to call the unknown caller
If you want to find out who called you, but don't want them to know that you are trying to find out who they are, a great idea is to use a friends phone to call the person and get to voicemail. Once in voicemail, if they have a customer greeting it should say who they are, and to leave a callback number. This will give you an idea wether the person is male or female, and if they have a regular phone number or a Google Voice number too. The point in…continue reading →