When I chat with my Thai girlfriend, many miles away, we usually use the LINE app. We don't directly use emoji's, but we do use stickers [0] as part of our chat. And I feel stickers provide much the same use as emojis, the can more easily be used to convey emotions in a chat that would otherwise be harder to interpret correctly.

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[0]: https://store.line.me/stickershop/showcase/top/en