Here are some simple tips for boosting your smartphone's volume ... go up to 100 decibels ("as loud as an ambulance siren"), ...

What's keeping phone manufacturers from adding ... 7th level is too low and on the 8th level it is too loud when watching videos. With a volume wheel, there shouldn't be a problem with precision.

The next time you reach for your phone in a public space, ask yourself: Is this the time to broadcast? Or the time to be quietly human?