Got it. Seems as if she is not using a signal booster, but setting things up so one device is situated in a good location and all devices respond to phone calls. Cool.
Just to be sure every one is clear. This is nothing more than FaceTime Audio and the audio bandwidth requirements are small enough to be carried either on an internet or cellular connection. If the call is
addressed TO or FROM a phone number it will at some point enter and be carried on the cell phone network.
The only things needed for this service are:
- An Apple ID/iCloud account
- A device running OS X 10.11, Mac OS 10.12, or iOS 10 and registered with the Apple Account (NOTE: the iOS device does not have to have a cellular connection or capability.)
- a valid cellular phone NUMBER associated with the Apple Account
- An internet connection
No cellular phone or data connection is needed. The phone call or text message is carried through the internet connection to some point where it is injected into the cellphone phone and/or data network and the connect time and data volume is charged to the cell phone account.
