To access the iPhone's sound settings, go to the home screen and tap 'Settings,' then 'Sounds.' In the 'Ringer and Alerts' section, look at the volume slider. You won't hear ringtone notifications if the slider is all the way to the left, so drag it to the right to raise loudness.
Activate Your iPhone
Restart the iPhone if necessary. If sound problems persist, press and hold the 'Sleep/Wake' button for a few seconds, then move the red 'Slide to power off' slider on the screen to switch off the iPhone. To turn on your iPhone, press and hold the 'Sleep/Wake' button one more.
Your iPhone Should Be Reset
Restart your iPhone. For at least 10 seconds, press and hold the 'Sleep/Wake' and 'Home' buttons simultaneously. to reset the iPhone I hope this answer will help you
