PLEASE READ before participating in the Minecraft Beta:

You will not have access to Realms and will not be able to join non-beta players while you're previewing the beta. Featured servers may also be unavailable

Xbox One and Windows 10 players can opt in and out of the beta from the Xbox Insider Hub app. Android players can opt in and out from the Minecraft page of the Google Play Store

Beta builds will likely be unstable and are not representative of final version quality. Please backup your Worlds before joining the beta