[ Oh! Hello, new best friend! Tsumugi tilts the phone a little more in her direction, giving her the clearest view possible as he begins poking around. ]

These phones are able to send and receive information through the air using waves. That way, we can take them with us and be able to use them anywhere. [ Or, well, anywhere with reception. But he won't go into that. ]

I'm afraid I can't show you an example, since I don't have any contacts, but [ He opens up the camera app and toggles it to front-view. ] if I were to start a video call with someone, they would see what we see on screen right now. [ Which is the two of them at a really unflattering angle. Good thing this isn't a real call! ] The picture and my voice would be sent to their phone through these waves, and my phone would receive their picture and voice in return.

[ There's still more he can explain (namely, apps), but before he continues: ] Do you have any questions so far?