Dear Kaspersky, I am having the exact same issue on my Samsung Galaxy S21 Ultra 5G (Android 11, build 998BXXU3AUHB). The issue only occurs when I am away from home and on mobile data. Whenever I use my phone it periodically during usage brings up 'Device Locked'* (as user alimohd showcases on his screenshot). I can easily unlock my phone but the frequency is unbearable, which is within minutes or seconds of using my phone. I use Android aspersky beta software for both Security Cloud (beta v1.45.0.33) and Anti-virus (I was unable to fetch update version after leaving the beta programme). My second issue is that My Kaspersky correctly sees my two devices added to my subscription, however my phone is not syncing to your services; I cannot update the database for the sync and unable to use the Anti-theft functions for testing (such as Alarm). I have taken a screenshot of the screen and the Update Database on this screen is non-functioning. In order to try and resolve my issues, today (18/09/21) I updated my Kaspersky password, removed myself from the Android Beta programme for each Kaspersky app mentioned above, and reluctantly disabled Kaspersky Anti-theft protocols in order to uninstall both apps. I will try the public version of each app however I am disappointed that this issue is disrupting my usage of my phone. *I did not use My Kaspersky to continuously lock my phone either. The issue described is as described above. I will update here on whether the public versions of the app work however I wanted to write here that the issue is apparent from another user.