iphone Xs has no sound on calls.
My iphone XS has no sound in either direction when calling over 4G. (Wi-Fi calling works fine.) The called phone rings but I get no ringing tone. When answered there is no voice heard in either direction. My SIM works in another phone and another SIM does not work in my phone. I have tried resetting Network settings but that hasn't helped. iOs is 16.2.
Recently bought it as refurbished but want to be sure it is a hardware fault and not settings or software before returning it.
Thanks in advance for any suggestions.
iPhone XS