iPhone 4, iOS 5.0.1
Strange problem I've had for a few months. Sometimes when a notification causes the iPhone to temporarily lower the volume, the volume gets "stuck in quiet mode" and doesn't resume full volume. As a result, music playback is approximately 25% quieter than normal. Sometimes getting a subsequent notification is enough to kick back to full volume.
This is very annoying because I never know when the phone is going to ramp up the volume suddenly (if I get a text message for instance).
What could I do on the phone that would force it to kick back to full volume? Something better than asking a friend to text me, or setting a 1 minute alarm, etc.