[After quite some time, having memorized Adam's diagram for how the phone works and trying much of it out himself, he decides to take pity on Dorian. Or maybe just show off that he knew without Dorian's help. Or - look, he's not really thinking hard about it.
Either way, Dorian receives a series of attachments via text - steady and readable photos of Adam's notes for Rainier about how the communicators work. There's no notes of Rainier's own to go with them]
[A day and a half later, after spending a number of hours playing with his phone and discovering that actually Rainier seems to have information he doesn't (unbelievable), he sends back a thank you. In the form of a carefully taken selfie at an excellent angle with good lighting and a little duckface.
Text w/ attachment
Either way, Dorian receives a series of attachments via text - steady and readable photos of Adam's notes for Rainier about how the communicators work. There's no notes of Rainier's own to go with them]
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You did this, Rainier. This is your fault.]
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