How on earth, or in space, do those communicators work? They appear to be fancy flip phones from about 15 years ago, before mobile phones were revolutionized into the minicomputer smartphones we see today. Seeing as their only function in the movie seems to be to communicate internally with other Starfleet members, it could be argued that they're more like sophisticated forms of interoffice walkie-talkies, or push-to-talk flip phones akin to Nextel's mid-90s devices. The ones in "Star Trek Into Darkness" may not sport Nextel's clunky antenna, but they seem to be clearly less sophisticated than today's modern smartphones -- unless, that is, a yet-unknown future technology eliminates the need for a "smart" phone, but we'll get to that.
Advantage: Modern Day
While we're on the topic of telecommunications, what network are they running those communicators on anyway?