&quot;A cell phone is always on my person&quot;<p>Its one of the defining social&#x2F;cultural separations of our generation.  Even inside families, my wife is a member of your camp and her phone is never out of her physical possession, ever, it even charges next to her in bed, whereas I&#x27;m in the other camp and I move my phone from charger to charger and only physically carry it when I&#x27;m going out for awhile or if I&#x27;m expecting a call.<p>It has the virtue that in any group of people, there will always be at least one with the ankle bracelet ready for use in one second, even if the battery is nearly dead, and at least one with a fully charged phone a couple minutes away on its charger.  So as a group you can get both instant response AND a full day of battery life.