Allow or Deny Apps to Modify System Settings
If an app suddenly asks for permission to modify system settings, it usually wants to adjust things like your ringtone, brightness, or wallpaper, not your lock screen or passwords. On ColorOS this permission sits deep inside the special app access menu, so most users never find it on their own. Without it, some apps fail silently when they try to change these settings automatically.
Turn Find My Device On or Off
If your Oppo phone goes missing, a deactivated Find My Device feature means you lose any chance to track, lock, or wipe it remotely. Many users only discover the toggle is off after the device is already gone, since it sits inside the Security menu rather than a separate app. Checking its status now takes less than a minute and closes that gap before it becomes a problem.
Set Up a Privacy Password
If Oppo asks for a privacy password when you try to lock an app or open Private Safe, that code is separate from your screen lock. Many users type in their unlock PIN by mistake and get stuck at the confirmation screen. The privacy password can be its own pattern, PIN, or password.
Enable App Lock
Anyone who picks up your unlocked Oppo phone can open banking apps, chats, or your gallery without another prompt. Coloros includes an app lock feature that adds a separate privacy password in front of individual apps, but it stays switched off until you activate it. Without this extra layer, sensitive data stays only one tap away.
Set Up Private Safe
Storing sensitive photos or documents in the regular gallery on your Oppo phone means anyone who unlocks the device can open them too. Coloros includes a Private Safe that keeps selected files behind a separate privacy password, but it stays inactive until you turn it on yourself. Without that extra step, your files sit unprotected next to everything else on the phone.
Auto Brighten Screen for Face Unlock
If Face Unlock keeps failing in a dark room or at night, the front camera likely does not get enough light to map your face. Coloros has an 'Auto brighten screen for face recognition' option meant to fix exactly this, but it is easy to miss and easy to leave switched off by accident.
Turn On-body Detection On or Off
Your Oppo phone stays unlocked the whole time you are carrying it, even after you slide it into a pocket or bag. That is On-body detection at work, a Smart Lock feature that reads motion sensors instead of checking who is actually holding the device. If someone else picks up your phone while it is still moving, they get straight in without a PIN or fingerprint.
Turn Off Screen Lock
If entering a PIN or pattern every time you check your phone feels unnecessary, you can remove the lock screen password on your Oppo phone entirely. The option sits under Password & biometrics and needs your current unlock code to confirm the change. Once disabled, the screen no longer asks for a code and unlocks with a simple swipe.
Show or Hide the Fingerprint Icon on the Lock Screen
On Oppo phones with an in-display fingerprint sensor, a small icon lights up at the sensor spot even while the screen is off. Some people find this glowing marker distracting at night or suspect it drains battery, and want to turn it off without losing fingerprint unlock. The toggle for this sits inside the screen-off unlock options, separate from the unlock function itself.
Turn Off App Lock
If Oppo's App lock keeps asking for your privacy password every time you open a protected app, that extra step gets old fast. Turning off App lock releases all currently locked apps and their data at once, so the password prompt stops appearing. You still need to confirm your privacy password to make the change.
Change Lock Screen Wallpaper
If your lock screen keeps showing the same picture as your home screen, ColorOS is applying wallpaper changes to both screens by default. This happens with your own photos, standard wallpapers, and live wallpapers alike. You need to pick the target screen manually to keep the two separate.
Show or Hide Password Characters While Typing
On Oppo phones, the last character you type into a password field briefly shows up on screen instead of staying hidden behind dots. That's handy for spotting typos, but it can expose your password if someone else is looking at your screen. Whether this happens depends on a single toggle buried in your security settings.
Rename a Fingerprint
On Oppo phones, every fingerprint you enroll gets a generic label like Finger 1 or Finger 2 by default. Once you have three or four fingers registered, telling them apart in the security settings becomes guesswork. Giving each entry a clear name fixes that confusion for good.
Turn On/Off Emergency SOS
If pressing the power button five times keeps launching Emergency SOS by accident, or the shortcut refuses to trigger when you actually need it, the Emergency call quick access toggle is probably set the wrong way. The feature works straight from the lock screen and dials your saved emergency contacts, so an unwanted trigger during everyday use can be just as annoying as a missing one in a real emergency.
Turn Google Play Protect On or Off
If Google Play Protect keeps blocking an app you trust or throws a warning notification every time you install something, the built-in scanner is doing its job a bit too aggressively. On Oppo phones this security check runs in the background by default and can interfere with sideloaded apps or apps from outside the Play Store. Turning the scan off, or back on, changes how much control Android has over what runs on your device.