[kondro]

It's expensive, but have data-roaming enabled on your phone. You'll only be using it for emergency server-maintenance after all - and surely you can bill it to your employer in those emergencies anyway.

[jrockway]

If this is for an employer, there should probably be someone monitoring the servers when jgc is on vacation.

[kondro]

There are plenty of employers that only have a single sys-admin on staff.