Just to know, why don't Mobile Team announce new betas in their blog like Desktop Team does?
They already do that...sometimes. They recently just made a new post about a new Opera for Android beta being available in Google Play... Except it hasn't appeared in Google Play yet, the Opera for Android 26 beta 1 is still the latest Opera for Android beta listed in Google Play. <.<
Mobile Team also made the announcement of a Opera Mini 8 for Android beta, but that has to be discussed over in the Opera Mini board, not here.