We recently changed to the new iPhone with a different carrier to get better cell coverage. At about the same time the Expedition received an update to the audio system. Ever since, no one can hear us over the microphone in the vehicle. We switch it to the phone speaker and everything is fine. I have no idea if it is the phone or the vehicle mic. Has anyone else had a problem like this and been able to fix it? I've done a phone restart and also a recent master reset on the Expedition, but still the same.