I finally had the chance to test this Ottocast issue thoroughly yesterday. And there's no way I can get it to work realiably. It's sometimes:
-visible but you can't hear any audio
-glitchy, and you can hear audio
-glitchy, and you can't hear audio
-black screen, and you can't hear audio (of course?)
The audio issue is strange because it might start working whenever it wants to, without doing absolutely nothing on the damn thing.
I've tried with wifi and bluetooth and both on and off, on car, on phone, with protective plastic film on and off, with armrest down or up. There's no way this thing is working. As soon as I plug the phone in via usb cable, everything works like a charm. Now I've got one last try, which is a procedure the Ottocast support suggested me, and it involves restoring the internal files on the box. If that fails, they'll do a refund. I'd rather have a working unit honestly, that's unfortunate.