I have had a level 2 support ticket open with Verizon for more than 2-weeks with more than 20-hours of support time logged without resolution. Apple has even replaced the XR to ensure the issue wasn't hardware on their side. The few setting option on the extender itself haven't made a difference, and neither has factory resetting the extender. The only temporary option identified so far is to shut off the extender and use WiFi calling on the iPhone. All non-iPhone devices lose the extender signal and also need to switch back to WiFi calling.