Incoming cellular calls ring on all my iOS devices When I receive an incoming cellular call on my iPhone 5 (iOS 8.3), it is propagated to all my other devices (including a wifi only iPad) connected to the same wifi network.

I guess that's an activated by default functionality, can it be deactivated ?
To disable on specific iDevices, go to Settings > FaceTime > iPhone Cellular Calls &amp; switch off.

On a Mac, launch Facetime, then Preferences > iPhone Cellular Calls - uncheck.