If you didn't notice: There is a 1.6.0 release of Riot on its way to Flathub :)
Riot 1.6.0 bring the new and shiny cross-signing features. Means you get TOFU now, can cross-sign your devices and users, which allows easy to transfer trust between all your matrix sessions.
Just make sure you use RiotX on Android in order to have all devices compatible :)
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