joyn has been designed to work over almost every network and mobile phone. Just turn on your phone and look for the bright yellow icon
If you don’t see it, you can joyn here.
Take a look at your address book and you should see the joyn icon next to some of your contact names – these people have joyn too.
joyn automatically ‘knows and shows’ the ways you can share with contacts at any particular moment. Chat, file share and video share all have their own icons to indicate what services are available between you and each contact at that point in time.