Iphone4s suddenly lost its sound

I have the same problem. I am really depressed. Yesterday, I watched The Voice of China on my mobile phone with PPS, and suddenly there was no sound. I thought it was a software problem, so I restarted it immediately, but it still didn't work. Then I turned off the background and all the settings of those sounds were reset. I turned it off and restarted it later, but it still didn't work. I search online. Some people say it's a software problem, others say I tried to clean the tail plug and earphone hole, but it didn't work. Then I brushed all the machines back! But it still doesn't work after recovery. 55555 wants to know if the speaker is broken. Today, Xiao Bai still hasn't recovered. I'm going to let it rest for two days and see if it can recover on its own. No, I really can't, so I have to have it repaired. Hey! ! Bad luck, what a tragedy! ! PS: I've never fallen into the water before it broke down, and there was no sound for no reason! RP can't ~ ~ ~ ~ t.t. ...