Welcome to Apple iPhone news and Chat discussion forums. iPhone Discussions is dedicated to iPhone,Talk about iPhone modifications,software,reviews,Support, iPhone news , iphone mobile,iPhone OS and more...
Cannot hear phone ringing. It is very low. Volume switch is on.
Have you tried raising the volume with the buttons on the side of the phone? After unlocking the phone with the passcode press and hold the top volume button and watch the screen. Does it show the "thermometer" bar all the way across?
Is it a built in ringtone or one you added? If it is added the volume of the ringtone track may not be high enough.

Reply something about Can't hear phone ringing iPhone 4S or Post a New Thread