Why is Apple's mobile phone always disconnected during the call?

If your mobile phone is frequently disconnected during the call, it may be related to your mobile phone. I suggest you change your mobile phone for the test. If it happens occasionally or in a fixed place, it may be related to strong radio interference, cross-regional switching, many surrounding tall buildings or network coverage. You can contact the local human customer service, and the company's network optimizer will conduct field tests and implement the corresponding network optimization work in the later stage.