I called apple support and they said that Phonak are not supported by apple. The application in their App Store someone put it there but is not created by apple. They say that as per FDA all HA should connect via bluetooth but they are not supported by apple. That is why Phonak HA have those bad connections and issues.
I cannot listen youtube because it cracks and has a lot of interference, also when I am walking like in the park the trees and the
power lines interfere the connectivity. When I bout the Phonak HA, they told me were supported by Apple but what a resource to
be sold.
I spent a lot of money in these HA and are useless for phone calls .Everybody complains the bad connection.