Comacon

Comacons is a gadget created by the Black Crow Corporation for Xandalarians to communicate with one another.

It is supported by the mana crystal beacons that is stationed within each kingdom.

History
15 years before the current timeline, Shiroki Izumi had presented an idea of some kind of portable communication so people don't have to go to call hubs near mana crystal beacons to call their families from other places.

Due to his small influence back then, the project was soon abandoned and was soon forgetten when is popularity increased.

Then, five years later. A team who called themselves Black Crow, had presented a prototype for all to see.

At first, it was not that known, but soon, people who have tried it passed the word on how great it was. The demands of a real one boomed and Black Crow started working on it.

At some point during when it was still being made, someone pointed out that this idea was stolen from Shiroki.

This created a large contreversy due to how popular Shiroki was. But it was soon solved due to the statements of Shiroki and the Black Crow's great reasoning.