After following some of the posts about Android compatibility with regular Bluetooth (rather that Made for IPhone connectivity) and the associated battery drain issues, I wonder why more of the users don’t opt for Google Duo or FaceTime using the MFI feature on their IOS device. I find that the audio is very, very clear. I think that the trade off of high battery drain for using Bluetooth is not worth it.
You’re ignoring this member’s posts.
Android 

So now I’m stuck with one or the other because the BB OS died. My phone still works perfectly fine and does all I need it to do and it even has bt 4.2 so it could theoretically connect to the Phonak Marvel.