I got the iPhone 4 two days ago, and I noticed that when someone calls me, the phone will vibrate, but it will not ring. The volume on the ringer is set to the highest level. I downloaded an update for the phone 2 days ago. What can I do to get my phone to ring? Do you think the update had anything to do with the problem?
Have you corrected the issue with the ringtone volume? If not, make sure the Ring/Silent button above the volume keys is turned on (if off, orange sticker will appear). Then go to settings > sounds > Ringer and Alerts > change the volume to loud. The vibrate options can stay on. If all of these settings are enabled, try changing the ringtone.