I did a clean install of iOS 11 on my iPhone, a clean install of Watch OS 4 on my 2nd Gen Apple Watch and a clean install of High Sierra on my iMac. I'm not getting calls on my iPad and Apple Watch when my iPhone is turned off (the iMac receives the calls and shows a notification, but it doesn't ring). The calls go through properly to all my devices when my iPhone is turned on, and everything is connected to the same Wi-Fi. My iPhone is set up properly; I have the message "Allow other devices signed in to your iCloud account to make and receive calls even when your iPhone is not nearby" in the settings. I've done everything Apple's instructions say to do. I've even logged out of iCloud on every device and signed back in on each. I'm using Verizon - is there something that they might need to do? For the Apple Watch, is it possible that this feature has been dropped now that there's a LTE Apple Watch?