My iphone is not good .

If you have a 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 speakerphone mode --> If your iPhone is stuck in headphone mode - Apple Support

If the other person is not able to listen to you then please click this--> If the microphones on your iPhone, iPad, and iPod touch aren't ...

If the above options do not mitigate the issues then Contact your carrier and then Contact Apple Support

Change 3D or Haptic Touch sensitivity on your iPhone

1. Go to Settings and tap Accessibility.
2. Tap Touch, then tap 3D & Haptic Touch. Depending on the device you have, you might see 3D Touch or Haptic Touch only.*
3. Turn on the feature, then use the slider to select a sensitivity level.

Change 3D or Haptic Touch sensitivity on your iPhone - Apple ...