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Even though Android Oreo 8.0 arrived in early February for the Honor 8 Pro and Honor 9, the much-anticipated Face Unlock feature wasn't included in the update for the former. However, owners now report that an OTA update fixes that. The update is a tad over 500 MB in size and it is being rolled out "in small batches". It also includes smart lock screen notifications - privacy feature that hides the notification content on the lock screen and prevents unauthorized people from reading them. The new firmware also brings the Android March security patch. Via
Source: https://www.gsmarena.com/new_ota_update_brings_face_unlock_to_the_honor_8_pro-news-30842.php