I would like to suggest a very important improvement regarding the power-off functionality of your mobile devices. Currently, anyone can turn off the phone directly from the lock screen, without requiring any form of authentication. This poses a potential security risk, especially in the event that the phone is lost or stolen, as it prevents the user from tracking the device or remotely securing it.
To enhance security and prevent unauthorized shutdowns, I recommend introducing an authentication feature that requires a password, PIN, fingerprint, or other form of verification before the phone can be powered off from the lock screen. This would provide an additional layer of protection, particularly in critical situations.