Suddenly, there was no sound on the phone. No news, no songs, no phone calls, no voice of the other party. The other party can't hear my call, and there is no sound.

System problem, my friend used to have a Nokia 76 10, and suddenly there was no sound. The situation is the same as yours. Later, I helped him off the plane and returned to normal. Don't pay too much attention to it, it's just that the system conflicts occasionally, and the software conflicts with the software. Just tidy up the software phone and keep it clean, OK!