iphone cellular calls is missing
I replaced my old iPhone 6 with the new one 8 running ios 11.1.1
Face time works good both ways but to use my Mac Book Air running OS X-Yosemite 10.10.5 for cellular calls it fails. I tried all suggestions on the net and non of them worked out. When I receive a call on my iPhone it rings on the mac as well on the phone, but if i try to answer the call from the mac book it fails.
Also the option on the iPhone 8 in the menu of face time is missing" iPhone Cellular Call."
Any suggestions?
Thank you.
iPhone 8, iOS 11.1