FaceTime has no "Calls from iPhone checkbox.
OS X ElCapitan V10.11.3, iMac (Late 2012), iPhone 6s iOS V9.2.1. FaceTime V3.0 (2600). My wife answers calls from her iPhone on her iMac (Late 2013) nearly every day. That feature used to work for me but I turned if off some time ago because I didn't need it. Now I need to re-enable it for business calls, as my iPhone gets no signal in my basement office.
The problem is, my iMac's FaceTime > Preferences > Settings, has no checkbox for "Calls from iPhone". My wife and I have exactly the same versions of all of the software installed. She has an iPhone 6 but mine is an iPhone 6s. I've verified that I'm logged onto the iCloud with the same ID. On my iPhone, FaceTime is allowed to use cellular data. Under FaceTime > Settings I've verified my iCloud account and the account is enabled. Under Phone > Calls on Other Devices > AllowCalls on Other Devices is enabled, and my iPad and my iMac are allowed. I can make and answer calls on my iPad. So, what happened to my "Calls from iPhone" on my iMac?
I've been searching the forums for hours, and it looks like Apple is telling me that WiFi calls aren't supported on Verizon, yet as I say, my wife uses it nearly every day and it works on my iPad.
Thank you in advance for any ideas.
iMac, OS X El Capitan (10.11.3)