What One UI 9 changes about lockdown and power menus
One UI 9 security changes refer to Samsung’s new default behavior where opening and exiting the power menu automatically triggers lockdown mode, disables biometric unlock, and returns the device to the lock screen so it can only be unlocked with a PIN, pattern, or password. In One UI 8.5 and earlier, the power menu offered Power Off, Restart, Emergency Call, and Medical Info, and closing it sent you back to whatever app or screen you were using. With One UI 9.0 Beta 2, exiting the power menu now sends you straight to the lock screen instead. At the same time, Samsung has removed the manual lockdown button from the power menu, replacing it with a more useful Medical Info shortcut, while turning lockdown into an automatic action that runs every time the power menu is opened and dismissed.
Automatic lockdown: fingerprint and face unlock are cut off
For years, Galaxy phone lockdown was a hidden, manual option that most users ignored. You had to remember to tap a specific button in the power menu to disable fingerprint and face unlock before handing over your phone. One UI 9 removes that decision. According to Digital Trends, One UI 9 Beta 2 “locks the phone and disables fingerprint recognition and face unlock” every time you open and dismiss the power menu. That means any attempt to unlock the device after that will require your PIN, password, or pattern. This sharply reduces the risk of someone forcing you to use your face or finger in a tense situation, while preserving biometric convenience in everyday use. It is a small change in taps, but a big shift in how often lockdown mode is activated in real life.
A more secure power menu that defaults back to the lock screen
The power menu itself now behaves like a security boundary instead of a simple system control. When you access it in One UI 9, you still see four options: Power Off, Restart, Emergency Call, and Medical Info. The important difference comes when you dismiss this menu. As SamMobile notes, the phone no longer returns to the screen you were on; instead, it always goes back to the lock screen. That single step makes casual, unauthorized access harder. If your Galaxy phone is lost, stolen, or snatched out of your hand, attackers have a narrower window to turn it off or browse your data using your open session. Once the power menu is opened and closed, they hit a lock screen that no longer accepts fingerprint or face unlock, only your secret code.
From user-managed toggles to automatic privacy protection
These One UI 9 security tweaks mark a clear shift from optional settings toward automatic privacy protection. Previously, Samsung exposed lockdown as a separate button that required users to know about it, remember it, and act fast under stress. Now the feature is woven into a natural gesture: pressing the side button and calling up the power menu. Samsung is lining up with Android 17’s security-first approach by tying a common hardware action to a reliable lockdown response without extra prompts. For users, the experience stays simple—there is no new toggle to learn—yet the default protections are stronger by design. While the behavior is currently confirmed in One UI 9 Beta 2 and not yet guaranteed for the stable release, it points toward a future where core defenses like power menu security and biometric lockouts happen silently in the background.
