The Spy call feature is advantageous when you are trying to make sense of the whereabouts and the surroundings of an individual by listening live to the voices and sounds taking place around the target mobile device. You do not need an internet connection. You register the SIM number of the calling device in the monitoring web portal or the monitoring app with the target device dashboard. Once the SIM number is added, you can use that device to make a call to the target device. The target phone’s microphone will be turned on without any phone bell ring or any other indication. You will be able to secretly tune into the sounds and voices taking place in the background of the device. Make sure that you mute the microphone of your calling mobile phone device before you make this spy call. Spy Call is a delightful feature when you need to discover someone’s surrounding activities and people, and you do not have the convenience of the Internet.