I'd love to turn my cellphone ringer off, but it's not really practical for a sysadmin.
And once I'm available 24/7 for work, I become available for anyone else that has that number.
And once I'm available 24/7 for work, I become available for anyone else that has that number.
As a sysadmin, this is why I pretty much always insist on an on-call rotation and escalation. Humans can't actually be available 24x7.
It's also not a foregone conclusion any more than a single cellphone has only one number. Google Voice has made call forwarding an inexpensive proposition.
Of course humans can't be "always" available, but there can be a (self-imposed) obligation to be as available as possible. Personally, I turn my phone off in theaters and museums, and at weddings and funerals.
I've considered setting up multiple numbers, but haven't yet.
Unimpose. That's all there is to the liberation promised by not carrying a cellphone.