[action]
[ He's not that much older than her, you know!
But feeling a bit awkward, Miwako reaches over and into her purse... She couldn't be arsed to clean it out yet, even after almost a week, so she still has her phone on her. It's the most pointless thing; she can't use it, after all. But there are pictures of her and Arashi on it, as well as pictures Caroline sent her, and videos of George she would send to Caroline for fun... Essentially, her phone holds all evidence of Paradise Kiss; so, even though it's essentially useless, she figures she'll carry it around with her until the battery finally dies.
In any case, she takes out her cell-phone - a nice flip-phone with a camera and a Happy Berry charm, one that she recently bought after Arashi broke hers. Very matter-of-factly, she holds it right in Sanji's face. This is essential human knowledge, you know. Nevermind that they're from different worlds - how could he not know what a cell phone is? ]
Cell phone. It's kind of like these communicator-thingies, but better. If we break out and go home, you need to buy one - I'll give you my phone number so you can ring me.