Schedule Do Not Disturb
Turning Do Not Disturb on and off by hand every night gets old fast, especially if your sleep or work hours shift. On Oppo phones, a missed toggle means notifications either interrupt you too early or stay silent longer than planned. A saved schedule handles the on and off switch on its own, without you touching the setting again.
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.
Show or Hide Notification Icons in Status Bar
On Oppo phones, every app pushes its own icon into the status bar, which quickly turns the top of your screen into a cluttered icon row. If you only want to see how many unread notifications you have, or nothing at all, the icon display is controlled through a separate notification setting. This setting changes how icons appear, not whether you actually receive notifications.
Set Default App Storage to SD Card
Running out of internal storage on your Oppo phone while the SD card sits mostly empty? You cannot install apps directly onto the memory card, but many apps let you redirect new data to it once you set the card as the default storage target. Whether this actually frees up space depends on whether the app itself supports external storage.
Turn Screencast On or Off
If your Oppo screen does not show up on the Smart TV or another display, Screencast is often switched off or the target device is missing from the list of available receivers. Screencast mirrors your phone screen over the network, but it only works once the feature is enabled on the Oppo and the other device is discoverable. Without that active connection, nothing gets transmitted even if the TV is on and ready.
Change App Icon Style
If every app icon on your Oppo still shows the same rounded-square outline, the built-in icon shape picker probably has not been touched yet. Coloros lets you switch all home screen icons at once between styles like standard, material, pebble, or a custom outline. The setting is easy to miss because it sits inside general appearance options rather than the home screen settings themselves.
Change Default Messaging App
If Messenger or another chat app keeps hijacking your text messages, Coloros still only lets one app act as the default SMS handler at a time. Several installed apps can request that role, which is why replies to notifications sometimes open the wrong client. Oppo controls this behavior through a single setting in the app management area, separate from the messaging apps themselves.
Turn Grid Lines On or Off in Camera
Framing a landscape shot without a horizon reference makes tilted photos easy to miss. On many Oppo phones the camera grid overlay is switched off by default, so there is no composition guide in the viewfinder until you turn it on. Photo and video mode also handle this setting separately, which causes confusion when the grid shows up in one mode but not the other.
Set Default Keyboard Language
If you type in two or three languages on the same Gboard keyboard, one of them always opens first no matter which app you are in. On Oppo phones this order comes from a language list that most people never touch, so the wrong language keeps showing up before you even start typing. Switching manually every time gets old fast once you notice the list itself controls what appears first.
Turn On or Off Flip to Mute Incoming Calls
If your Oppo phone keeps ringing loudly during meetings even after you flip it face-down on the table, the flip-to-mute gesture might be turned off. This gesture silences an incoming call the moment the screen faces down, but only when it is enabled in the gesture settings. Some users also find the opposite problem: calls go silent unexpectedly whenever the phone lies flat.
Show Connection Speed in Status Bar
If you keep opening the data usage screen just to check how fast your connection is, Oppo can show that number right next to the signal icon instead. On Coloros this real-time network speed indicator is switched off by default, so the status bar only displays signal strength and battery. Turning it on adds a live Mbps or KB/s reading that updates while you browse or stream.
Turn On/Off Contact Suggestions in Messages
Typing a name into a message on an Oppo phone should pull up matching contact details automatically, but nothing shows up. This happens because the 'Suggest Contacts' feature inside the keyboard settings is switched off by default, even though the contact itself is saved correctly on the device.
Forget a Saved Wi-Fi Network
If your Oppo phone keeps reconnecting to an old Wi-Fi network with a wrong password or a router you no longer use, it is still sitting in the saved network list. ColorOS holds on to every network you have ever joined until you remove it yourself, which can cause slow reconnects or a jump to the wrong access point when two networks share a similar name.
Change Camera Storage Location
If new photos on your Oppo phone keep filling up internal storage even though a memory card is inserted, the camera app is likely still set to save shots to the device only. This becomes a problem once internal storage runs low and you cannot move existing photos automatically. Switching the preferred save target inside the camera settings fixes this without touching your gallery app.
Set Up Face Recognition Unlock
If Face unlock is missing from your Oppo lock screen options, it usually means no unlock password has been set yet. ColorOS requires a password or PIN as backup before it lets you register your face for the screen lock, app lock, or private safe. Without that step, the Add face option stays hidden or greyed out.
Add App Shortcut to the Home Screen
On Oppo phones running the App Drawer layout, newly installed apps stay tucked away in the drawer instead of landing on the home screen. If you keep swiping up just to launch one app, you are missing a shortcut that needs to be placed there manually.
Allow Repeated Calls in Do Not Disturb
Urgent calls from the same number can go straight to silence when Do Not Disturb is active on your Oppo phone. ColorOS has a built-in exception that lets a second call within three minutes ring through, but it stays switched off until you turn it on yourself. Without it, every call gets muted the same way, no matter how often someone tries to reach you.
Activate a Downloaded Keyboard
After installing a new keyboard app on your Oppo phone, the system keeps typing with the default keyboard instead. ColorOS keeps every input method, including downloaded keyboards and voice typing, switched off until you turn it on yourself in one central menu. Without that extra step, the new keyboard app sits on your home screen but never appears when you tap a text field.
Turn Data Roaming On or Off
If your Oppo phone loses mobile data the moment you leave your home network, data roaming is probably switched off. Abroad, mobile data and sometimes calls only keep working once roaming is enabled for the active SIM. Outside the EU in particular, this setting can trigger noticeable extra charges from your carrier.
Change Media Volume
If videos, games or music play louder or quieter than expected on your Oppo phone, the media volume slider is usually the cause, not the ringtone or notification volume. This level controls audio for apps and their content separately from calls and alerts. On some ColorOS versions the volume buttons only adjust it while media is actively playing.
Turn On/Off Automatic Data Sync
If contacts, calendar entries or photos on your Oppo phone stop updating in the background, the account sync toggle has likely been switched off. This setting controls whether signed-in accounts like Google keep pushing changes to your device without you opening each app manually.
Turn VoLTE Calls On or Off
If your Oppo phone keeps falling back to a 2G or 3G connection for calls, call setup takes longer and voice quality suffers. This happens because VoLTE is switched off or was reset after a system update, so the phone dials over the older mobile network instead of your 4G data connection. Carrier support and a valid data plan both play a role here.
Reset Camera Settings to Default
If your Oppo camera app looks off after tweaking resolution, grid lines, watermark or video quality, tracking down every changed option one by one gets tedious fast. Filters, saved modes and exposure tweaks can pile up until the app behaves unpredictably. ColorOS includes a single function that reverts every camera option at once instead of making you undo each change manually.