Q：The probability of intermittent call audio, volume decreasing, or no sound.
A：1. First, check the network environment. A sudden decrease in network speed, signal strength, or interference may indicate a problem.
2. The network environment your phone is in may be overloaded. Try changing your location for the call.
3. The microphone may be blocked by a finger.
4. The volume down button may have been accidentally pressed during a call.
5. For other network issues, try a different location.
