How to find out information from the phone of the person interested?
You can install phone tracker https://www.refog.com/phone-tracker.html on your phone. This will give you full information about who the phone owner is communicating with. You will also know where he is located
You can check not only calls and SMS but also all other information from the phone by connecting a free phone tracker https://www.hoverwatch.com/ By the way, with the help of this application you can check the online activity of the person you are interested in and even know his location.