In order to use Automatic 3-way calling you will need another phone, e.g. your own device, that will become the so-called Monitoring phone.

– Go to your OwnSpy settings page
-Select «your device» in top of the screen -> Settings -> Features
– Show the Call Interception options
– Enter your monitoring phone number in international format, like this: +14152002231. Make sure you do not enter brackets, parenthesis, hyphen, etc. just the + symbol and the numbers
– Select if you want to intercept all the calls or selected calls and enter one number per line

You need to enter your own device number on the «Monitor device number» box on Call Interception settings. Every time your target device makes or receives a call, you will receive a SMS. Then, you may call your target device as usual in order to join the ongoing conversation. If you do not want to be heard, please mute your mic

** ** Please note these SMS will appear on the target device bill.