Why is the volume so low on my iPhone 6?

Episode 1168 (37:56)

Bill from Carlsbad, CA
Apple iPhone 6

Bill's iPhone 6 volume is really low on both the speakers and in his headphones. He can't hear it. Leo says that there may be a setting in the phone that limits it to protect hearing. So it may have been enabled on the iPhone 6. The setting is in Music, and it's called Volume Limit. It's off by default, but maybe it got turned on by mistake.