It amazes me that our master clocks can be so accurate and yet our devices, which ostensibly get their time from the master clocks through networks, can be so o

It amazes me that our master clocks can be so accurate and yet our devices, which ostensibly get their time from the master clocks through networks, can be so off. My Android phone is very frequently 30 seconds or more off from my friends' iOS phones. I don't even...