Contacting people over large distances. It's in real time, so you don't have to worry about any sort of delay.

[A short pause, and then she laughs. ] Or a good flashlight if it's dark out an' you need to find somethin'. But here,

[Kate starts, gently tapping the screen to light her own phone up, going slowly to help her navigate the menus to a private line with her. ]

Watch, [Kate herself sends a short text to Historia, compromising entirely of just a quick Hello! 💖 while showing ger how to navigate to the appropriate menus.]