I am not able to get Google Voice under control.

My iPhone never rings when I get a call. I use T-Mobile.

And sometimes some app on my Mac will ring when I get a phone call and I can take the call there. But now this is not working either. I wish I understood what app this is, and how to view its settings. It seems to emanate from GMail. Not sure.

So when I get a call, I get no notification until a voicemail message appears in my Gmail inbox. This is really screwed up, I'm sitting at my computer, waiting for a return call, and it doesn't ring. So I call them back, leave a message, and round and round we go.

Does anyone know a sure-fire way to get Google Voice to actually ring something I can answer someone near where I am?

This shit used to work flawlessly.

Update

At least part of the problem is that I had the ringer off on the iPhone.