Yeah I get notification sounds for text messages but the RX button does not highlight at all, I’ve been on a ground frequency for like 15 minutes then switched to the clearance delivery frequency for another 10 minutes on a busy airport and heard nothing.
I’m not sure what you mean by this, I’m a first time VATSIM user and I’m guessing you mean UNICOM? Should I try to go to a busy airport without ATC coverage and tune in to 122.8?