may be complete coincidence, but about 8-9hrs ago my friend's iphone started acting up; emails vanishing while they were reading them, sub-routes in apps silent

may be complete coincidence, but about 8-9hrs ago my friend's iphone started acting up; emails vanishing while they were reading them, sub-routes in apps silently failing back to main screen... even if this is unrelated - disconcerting to hear that the unit's usability is so closely tied to online services