I agree with Paris Geek, and would add to that, since we are discussing that option.
The current option explains "disable scheduled sync". It is ambiguous. E.g., does it include "PUSH"? Is that considered to be scheduled, or the author meant just truly scheduled?
And "event-based" sync, - is that scheduled or not?
So, I would even propose a step further.
Kostya, for the reasons you described (international travel, roaming, ...), there should be a simple, single master switch, that disables all automated syncing.
Well... maybe it should be of two flavors: (a) All mobile automated syncing and (b) ALL automated syncing?
I don't know what's the best (the least confusing) way of implementing that? Maybe as a multiple choice option:
* All automatic syncing disabled
* Disable all syncing on mobile networks
* All configured syncing enabled .