Except Extend Home doesn’t work like a Bluetooth-linked handset. The latter relies on the phone, which must be connected by Bluetooth, as the source of the call, so only calls that earn the right to ring the cell phone would also ring the Bluetooth handset.
Extend Home doesn’t rely on the cell phone. If the cell phone is broken, turned off, or a bajillion miles away, the Extend Home phone is still going to ring. Calls are being routed to Extend home from our servers, and those servers do not access your cell phone to make sure it’s ringing before routing the call to Extend Home.
Our spam-blocking technology that includes blocking calls from going to voicemail will block calls from Extend home, because with that level of blocking, information has to be passed from our app to our servers, in order to block access to voicemail. Other options (no matter whether they are in our app or a third-party app) that prevent only the cell phone from ringing will not prevent Extend Home from ringing.