iPhone cannot hear flip phone
iPhone 12 and 13 pro running iOS 15.1.1 cannot hear conversation from tcl flip phone when the iPhone originates the call. the call disconnects after about 20 seconds with a message on the iPhone to try enabling Wi-Fi settings. This does not work.
when the call originates from the tcl flip phone communication works in both directions. iPhones running earlier iOS seem to work. Have spent hours working with both Verizon and apple with no resolution.
iPhone 13, iOS 15