My Apple 4 suddenly lost its sound, game sound, short message. I can't listen to music There is still a phone ringing. You can also answer the phone. What's going on here?

When you get to the designated maintenance point, he will check it for you first to see if it is man-made damage or the machine itself.

If the machine itself has quality problems, he will help you change everything except the back cover.

PS: You'd better back up your address book, text messages, etc. Before maintenance.

Because he wants to restore the factory settings, all your things are gone. After the repair, you will have a brand-new mobile phone, hehe. I hope to adopt it ~