Turn Lock Screen Notifications On or Off
If notifications keep showing full message previews on your Oppo lock screen, the 'Lock screen notifications' option is likely set to display title and body for that app. ColorOS handles this setting per app, so one app can stay silent while another still alerts you. Left on the default, anyone who glances at your phone can read message content before you unlock it.
Turn Camera Watermark On/Off
If every photo or video from the camera app carries an unwanted overlay with the phone model, date, time, or location, ColorOS added that watermark automatically. On some Oppo phones the setting stays active after a reset or software update. It only affects the built-in Camera app, not third-party apps or the gallery.
Turn Screenshot Gestures On or Off
If a screenshot pops up every time you swipe down with three fingers, or a partial capture opens whenever you touch and hold with three fingers, the screenshot gesture settings on your Oppo phone are active. These gestures work independently from the button combination and are enabled by default in ColorOS. Random captures while gaming or scrolling usually point to one of these gestures firing by accident.
Hide and Show Apps on the Home Screen
Anyone can open your banking or messaging app just by tapping its icon on the home screen. Coloros lets you hide selected apps behind a password prompt, but the setting sits inside the Privacy menu and is easy to overlook. Once an app is hidden, it disappears from the app drawer and only reappears after you unlock it through a hidden code.
One-Handed Mode: Turn On or Off
Reaching the top corners of a large Oppo screen with a single thumb is often impossible, especially when you are holding a bag or standing on a train. One-Handed mode shrinks the whole interface into a smaller window so every icon stays within thumb range. Many users only discover this option by accident inside the Quick settings panel.
Stay on the Lock Screen After Face Unlock
When you press the power button on an Oppo phone, Face unlock often skips the lock screen entirely and drops you straight onto the home screen. That means you never get to check notifications, the clock, or widgets before the phone unlocks. The setting responsible for this behavior sits inside the Face recognition options and is easy to miss.
Turn Vibrate on Touch On or Off
If your Oppo phone buzzes every time you tap the navigation bar, open a menu, or dial a number, the touch feedback vibration is switched on. This system-wide haptic response can feel excessive on Coloros, especially when it triggers during simple actions like scrolling through settings or answering calls. You can turn it off without changing your ringtone or notification vibration settings.
Show or Hide RAM Info in Recent Tasks
When you swipe through open apps on your Oppo phone, the Recent tasks screen only shows app previews by default, with no memory data at all. If you want to see how much RAM is currently in use without opening a separate app or tool, that information stays hidden until you switch it on in Coloros.
Turn Off TalkBack (Accessibility)
If TalkBack is running on your Oppo phone, a single tap only selects an item and reads it aloud instead of opening it. Every action now needs a confirming second tap, which makes even switching TalkBack off feel out of reach. This select-then-confirm control catches most users off guard exactly when they try to disable the feature.
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 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.
Set Alarm Ring Duration
If your Oppo phone's alarm cuts off after just 5 minutes and you keep sleeping through it, the ring duration is still on the default setting. You can stretch it up to 30 minutes or shorten it to as little as 1 minute, depending on how deep a sleeper you are.
Turn Location (GPS) On or Off
When Smart Lock or Find My Mobile suddenly stops working on your Oppo phone, the location service is often the reason. Many apps also keep asking for GPS access even though you thought you had turned it off completely. Location tracking on ColorOS can be controlled system-wide or per app, and mixing up the two settings causes most of the confusion.
Customize Smart Sidebar Quick Access
If your Oppo's Smart Sidebar is packed with tools you never open, or missing the one app shortcut you actually need, the Quick access list needs an edit. The sidebar mixes three shortcut types: Quick Tools like screenshot or screen recording, Quick Apps that open in a floating window, and plain App shortcuts. Left unedited, you keep swiping past icons that only get in the way.
Turn Touch Sounds On or Off
If your Oppo phone plays a short click every time you tap the navigation buttons or on-screen keys, the 'Touch sounds' feature is active. Some people find this feedback helpful, others just want a quiet phone without extra clicks on every tap. The setting sits separately from your ringtone and notification sounds, so muting your phone will not remove it.
Remove a Folder from the Home Screen
Deleting a folder on your Oppo phone can go two ways: either the folder disappears together with every app icon inside it, or only the folder itself is dissolved and the apps land back on the home screen. Mixing up these two options often leads to accidentally losing apps you actually wanted to keep.
Turn Deletion Sound On or Off
Deleting a message or notification on an Oppo phone sometimes triggers a short confirmation sound, and sometimes stays silent, depending on a single switch in the sound settings. If that click annoys you during meetings or at night, or if you suddenly stopped hearing it and want it back, the fix sits in one specific menu. The setting applies system-wide rather than per app, which is why toggling it once changes the behavior everywhere.
Change Time Zone Manually
If you swap SIM cards or connect to a foreign network, your Oppo phone often jumps to the wrong time zone on its own. Clock apps, alarms and message timestamps can then be off by hours, because Coloros pulls the zone from the current network instead of your actual location.
App Drawer: Turn On or Off
New apps on your Oppo landing straight on the home screen instead of a separate app list usually means the App Drawer is switched off. Without it, every install adds another icon to your screen, and there is no dedicated overview to browse through installed apps. On ColorOS this behavior is controlled through the home screen layout mode, not a standalone app-drawer toggle.
Dark or Light Theme for the Phone App
If the Phone app on your Oppo still opens in a bright white interface at night, it can strain your eyes and drain the battery faster than needed. Unlike the rest of ColorOS, the dialer and call screen sometimes keep their own display setting separate from the system-wide dark mode. Switching it manually only takes a few taps.
Set Up a VPN Connection
If your company or university hands you server details instead of a ready-made VPN app, your Oppo phone needs a manual profile entered directly in the system settings. Without the right protocol, server address and login data, the connection fails silently or drops right after you save it. This is different from installing a VPN app from the Play Store, which handles the setup on its own.
Set Dark or Light Theme for the Messages App
If the Messages app on your Oppo phone still shows a bright white background at night, it is running the light theme regardless of your system-wide dark mode setting. Coloros lets you set the theme for Messages on its own, which cuts glare and can lower battery drain on OLED screens. This option sits inside the app itself, not in the general display settings.
Set Up Fixed Dialing Numbers (FDN)
If your Oppo phone dials out to numbers you did not approve, or a shared device keeps calling premium lines by mistake, Fixed Dialing Numbers can lock outgoing calls to an approved list. Incoming calls stay unrestricted, only outgoing numbers get filtered. The feature sits behind PIN2, which is easy to overlook in the carrier settings menu.
Answer an Incoming Call
If a call pops up on your Oppo and tapping the screen does nothing, you are probably looking for the wrong gesture. Oppo phones show incoming calls as a full-screen alert rather than a simple tap-to-answer button, which confuses anyone switching from a different Android brand.