We advise you to use the application "Discord". This 100% free application allows you to talk to others, such as a group phone call. All, without limit of scope, and without the constraint of having intercoms of the same brand.
You and your fellow (or your passenger) will also have to install this application. The advantage of Discord is to be able to set the sensitivity of the microphone, which prevents others from hearing engine noise and wind if you use a jet helmet. This application is very simple to use, but if you have any questions, do not hesitate to contact our team.