New update for iPhone 7plus

If you have distorted Sound issue on your iPhone --> If you hear no sound or distorted sound from your iPhone, iPad

If you are not able to hear the other person, click this...>If you can't hear a person on a call or voicemail or if the sound isn't ...

If you only hear through speaker phone mode --> If your iPhone is stuck in headphone mode - Apple Support

On an iPhone X or later or an iPad, swipe down from the upper-right corner of the screen. ... If the LED flash doesn't work as a flashlight, contact Apple Support for help with your iPhone, iPad, or iPod touch. If the flash works only sometimes, open the Camera app and tap the flash button to choose a different setting.

If the camera or flash on your iPhone, iPad, or iPod touch isn't ...

If you are unable make a call or receive; If you can't make or receive calls on your iPhone - Apple Support