Enable or Disable Google Play Protect
If Google Play Protect keeps flagging apps you trust, or you cannot install an APK because the scan blocks it, the built-in protection is doing exactly what it is designed for. On the other hand, if scans slow down installs or you rely on a different security app, you might want to turn the feature off. Either way, the setting sits inside your security options and controls how OnePlus checks every app you download.
Enable or Disable Auto Sign-in for Saved Passwords
If Chrome logs you into a website the moment it loads, without ever asking for a password, Auto sign-in is likely active on your OnePlus phone. It uses account names and passwords stored in the browser to skip manual entry completely. That is convenient, but anyone who picks up your unlocked phone gets the same instant access to those accounts.
Manage Site Permissions in Chrome
If a website suddenly asks for your location or camera without warning, or a page refuses to load because cookies got blocked, the site permissions inside your OnePlus browser are responsible. Every website can hold its own access rules for cookies, location, camera and microphone, separate from your phone's system settings. Once you have granted or denied access a few times, keeping track of which sites hold which permissions gets confusing fast.
Change Lock Timer After Sleep Mode
After the screen turns off on a OnePlus phone, the device does not lock right away. By default it stays unlocked for a few seconds with a black display, so anyone who wakes it up in that window gets in without a pattern, PIN, or password. This delay sits in the lock screen settings and most people never notice it until they hand the phone to someone else or leave it on a table.
Rename a Fingerprint
Every fingerprint you register on your OnePlus phone gets a generic label like Finger 1 or Finger 2, so telling your own thumb apart from a partner's index finger later is pure guesswork. Once several prints are stored for unlocking or app logins, keeping track of who owns which slot gets confusing fast.
Permission Manager: Control App Access
When an app suddenly asks for camera or location access again, or you are not sure which apps can read your contacts, the Permission Manager on your OnePlus gives a clear per-function overview. Instead of digging through each app individually, you pick a function like Camera or Location and see every app that currently has access to it. This makes it much faster to spot apps that have no real reason to hold a sensitive permission.
Allow or Deny System Settings Permission
Some apps on your OnePlus phone ask to change system settings on their own, like the wallpaper or ringtone. This permission only covers those convenience settings and has no effect on security features such as the screen lock.
Disable Lock Screen Password
If your OnePlus phone still asks for a pattern, PIN or password every time you wake the screen, the lock screen security feature is still active. This also keeps fingerprint and face unlock tied to that passcode, so removing it wipes any saved biometric data. You need your current unlock method on hand before you can turn the request off.
Remove a Fingerprint
If a fingerprint no longer unlocks your OnePlus reliably or a scan keeps failing at the payment screen, an old or damaged fingerprint entry is often the cause. Up to five fingerprint IDs can sit on one device, and a faulty one among them slows down every unlock attempt. Removing the wrong finger entirely also switches off fingerprint unlock and fingerprint payment if no other ID remains.
Enable or Disable Incognito Mode in Chrome
If a search on your OnePlus suddenly opens inside a dark grey browser tab with a small mask icon in the status bar, incognito mode is active in Chrome. Bookmarks, history and autofill data stop saving in that tab, which can be confusing if you expect your usual browsing setup to load. Knowing where this mode lives helps you switch it on for private searches or turn it off when regular browsing feels off.
Enable or Disable Find My Device
If your OnePlus goes missing and Google's Find My Device page marks it as offline, the tracking feature is probably switched off in your security settings. Without it active, you can't locate, ring, lock, or erase the phone remotely from a browser or another device.
Turn Off Instant Power Button Lock
If you tap the power button on your OnePlus even for a second, the screen locks right away and asks for your PIN, pattern or fingerprint again. That gets annoying when you only wanted to check the time or accidentally bumped the button. A setting inside the lock screen options controls whether the power button locks the phone instantly or with a short delay.
Set a Lock Screen Password
If your OnePlus phone has no lock screen password set, anyone who picks it up can open contacts, messages, photos and apps without restriction. OxygenOS offers Pattern, PIN and Password as unlock methods, but many users skip this step during setup or after a reset. Without an active lock method, private data and payment apps stay exposed the moment someone else grabs the device.
Enable or Disable Speak Passwords in TalkBack
If TalkBack reads your password out loud while you type it on your OnePlus, anyone standing nearby can hear it, from a bus seat to a shared office. This happens because the Speak passwords option makes TalkBack announce each character as confirmation for people who cannot see the screen. Depending on where and how you use your phone, you may want this feature active or completely switched off.
Power Button for Quick SOS
If your OnePlus suddenly dials the emergency number after you press the power button several times in a row, the quick SOS option in Security & Privacy is active. This shortcut is meant to speed up emergency calls, but it can trigger by accident in a pocket or bag. Knowing where this setting lives helps you switch between three or five presses, or turn it off completely.
Add Users from Lock Screen (Enable/Disable)
Anyone who picks up your locked OnePlus can still create a new user profile if 'Add users from lock screen' is turned on. That option sits inside the multi-user settings and lets someone add an account without ever unlocking your device first. Turning it off limits the lock screen to switching between profiles that already exist.
Lock Apps with an Extra Password
If anyone who picks up your unlocked OnePlus can open banking, messaging or gallery apps without any extra check, App locker is still switched off. OxygenOS can require your lock screen password or pattern again before those specific apps open. You can also decide whether notification previews from locked apps still show up on the lock screen.
Manage Individual App Permissions
If a OnePlus app suddenly can't reach your contacts, camera, or storage, a permission was likely denied at some point, either by you or automatically. Apps only ask for access like location or storage when they actually need it, and each prompt can be allowed or denied on the spot. Over time this leaves some apps running with limited access for reasons that are not obvious anymore.
Change Lock Screen Clock Style
If the default lock screen clock on your OnePlus phone looks plain, you don't have to keep it. Some styles only show digits, while others add an analog face or a date line underneath the time. Which one fits depends on a setting most people never open.
Change Lock Screen Wallpaper
If your lock screen still shows the default rotating daily image instead of your own photo, the wallpaper picker on OnePlus phones treats the lock screen and home screen as two separate slots. Many users only change the home screen and wonder why the lock screen keeps switching on its own. The fix sits inside the Customization menu, not the regular wallpaper shortcut.
Show or Hide Password Characters While Typing
On a OnePlus phone, each character you type into a password field flashes briefly before turning into an asterisk. That short preview lets anyone glancing at your screen catch a glimpse of your login details, which becomes a problem in public places or shared spaces.
Add another fingerprint
If your OnePlus phone only unlocks reliably with one specific finger, switching hands or holding the phone at an angle often causes failed scans at the lock screen. Oxygen OS lets you store several fingerprint IDs at once, not just the first one you registered during setup. That only helps once additional fingers are actually added and named so you can tell them apart later.
Change Preset Theme on Home and Lock Screen
If your OnePlus home screen and lock screen still look the way they did out of the box, the preset theme is the setting controlling color accents, brightness, and overall tone. Oxygen OS bundles three built-in styles - Vibrant tints, Illuminating light, and Nuanced dark - but the switch sits inside a settings area many users overlook. Picking the wrong one can also affect how icons and widgets read in daylight or at night.
Reset Advertising ID
If ads on your OnePlus phone keep referencing searches or apps you thought were forgotten, the advertising ID behind them is still doing its job. This identifier links your activity across apps so companies can keep refining the same profile of you. Resetting it breaks that link and forces every app to start building a fresh, anonymous profile.