Turn On/Off Call Forwarding
If calls keep landing in your voicemail or a colleague never gets your missed calls, call forwarding on your Oppo phone might be set to the wrong option. ColorOS separates forwarding into If busy, If unanswered, If not available and Always forward, and each one reacts differently depending on your line status. Picking the wrong mode is the usual reason calls disappear instead of reaching a backup number.
Set Default Browser App
Tapping a link on your Oppo phone keeps launching Chrome even though you installed a different browser. That happens because Android still lists Chrome as the default handler for web links, regardless of which app you actually prefer to use. Until you switch that setting, every link from messages, emails or apps will keep opening in the wrong browser.
Schedule Power On/Off
If you want your Oppo phone to turn on or off at a fixed time every day without pressing the power button, ColorOS has a built-in scheduler for that. Many users miss this option because it sits inside a secondary settings menu rather than the main power settings. Without it enabled, you have to manually power the device on and off every single day.
Optimize Battery Usage for Background Apps
If WhatsApp or Messages notifications arrive late or not at all on your Oppo phone, background battery optimization is usually the cause. ColorOS restricts or shuts down inactive apps to save power, which interrupts push notifications and syncing. You can control this behavior per app instead of letting the system decide on its own.
Auto Switch Between Wi-Fi and Mobile Data
If your Oppo phone keeps stalling on a weak Wi-Fi signal instead of jumping to mobile data, the Wi-Fi Assistant feature is either switched off or mobile data itself is disabled in the background. Videos buffer, messages send late, and apps time out even though the Wi-Fi icon still shows a connection. This setting decides whether your phone hands over to mobile data automatically once Wi-Fi quality drops.
Set a Default Calling SIM for a Contact
On a Dual SIM Oppo phone, outgoing calls tend to go out on whichever SIM was used last, which gets annoying when you keep switching SIM manually before dialing a specific person. If a contact has both a private and a business number saved, the wrong SIM can also mean the wrong caller ID or tariff for that call.
Turn Auto-capitalization On or Off
If sentences and random words get capitalized automatically while you type, Gboard's auto-capitalization is switched on and reacting to every full stop or new line. On Oppo phones this text correction option often catches names, abbreviations or chat messages where you want a lowercase start. Turning it off stops Gboard from capitalizing the first letter after punctuation and at the beginning of each sentence.
Allow or Restrict Background App Activity
If messaging apps on your Oppo phone only show new messages after you open them, or a fitness tracker stops logging steps overnight, ColorOS battery management is likely blocking that app in the background. The 'Allow background activity' toggle decides whether an app can keep running once you switch away from it, and a disabled toggle can silently break notifications, syncing, and tracking.
Turn Keyboard Vibration On or Off
If typing on your Oppo phone feels silent even though you want tactile feedback, or the opposite happens and every tap buzzes when you want quiet, the keyboard has its own vibration setting separate from your system sound menu. Oppo devices run Google's Gboard by default, and its haptic feedback toggle is often confused with the general vibration options elsewhere in the phone. Even with the toggle switched on, the vibration level itself can still be set to zero, which mutes the effect completely.
Navigation Button Order
On Oppo phones running virtual button navigation, Back and Recent Apps sit on opposite sides by default, which feels backwards if you switched from another brand. Two-button navigation drops the Recent Apps key entirely, so switching order or layout style changes how you reach multitasking and going back.
Block Offensive Words in Gboard Suggestions
Typing certain words on your Oppo keyboard and getting no suggestion at all can be confusing, especially if autocorrect skips slang or informal terms you actually meant to use. This happens because the Block offensive words option in the keyboard text correction settings filters out profanity and vulgar terms before they reach the suggestion bar. Switching this filter on or off changes exactly what Gboard is allowed to suggest while you type.
Enable Geotagging for Photos and Videos
If your photos never show where they were taken, geotagging is likely turned off in the camera settings. Without it, the shot's location never gets written into the file's metadata, so gallery apps and map views cannot place the picture on a map later. This toggle sits directly in the camera app, separate from the general location settings.
Turn Google Voice Typing On or Off
If a microphone icon keeps showing up on your Oppo keyboard even though you never asked for voice input, Google voice typing is active by default under ColorOS. It sits inside the keyboard settings alongside your regular input method, so many users only notice it once they tap it by accident. You can switch it off there, or turn it back on if speech input disappeared after an update.
Set a Custom Ringtone
If the built-in ringtone list feels too limited or you cannot find the option to use your own audio file, ColorOS often buries this setting inside the Sound menu instead of the main Ringtone screen. On dual SIM devices the confusion gets worse, because each SIM card needs its own ringtone assigned separately. Picking a random music file from your gallery app or file manager usually will not apply it as a ringtone either.
Turn Flashlight On or Off
Searching your app drawer for a flashlight icon on your Oppo phone gets you nowhere. Coloros does not ship a standalone flashlight app, so the toggle sits hidden inside the quick settings panel instead. Anyone coming from a different Android skin usually looks in the wrong place first.
Switch Between Navigation Buttons and Gestures
If the three navigation buttons at the bottom of your Oppo phone take up screen space or the swipe gestures keep triggering by accident, you can switch between both control modes at any time. ColorOS lets you pick virtual buttons or full-screen gestures depending on how you actually hold and use your phone.
Block Unknown Callers Automatically
If your Oppo phone keeps ringing from numbers that are not saved as contacts, spam calls and unknown callers get through every single time, even at night or during work. ColorOS has a built-in filter for exactly this, but it works differently from a normal blocklist. The setting rejects any caller missing from your address book, with one safety exception for repeat callers.
Force Full-Screen Mode for Non-Optimized Apps
If an app still shows the status bar and navigation bar on Oppo phones, the system has not marked it as full-screen optimized. This happens with older or less common apps that ColorOS does not automatically stretch to the edges. You can force full-screen display manually, but only if the app itself supports it.
Turn Eye Comfort On or Off
If the screen feels harsh on your eyes after dark, Oppo's Eye comfort mode is probably switched off or set to the wrong schedule. This blue light filter warms up the display and lets you adjust how strong that tint should be. Many people never notice it because it sits inside Display settings instead of a dedicated night mode switch.
Assign Colors to Calendar Categories
If every entry in your Oppo Calendar looks the same, it gets hard to spot a birthday among work meetings or holidays at a glance. Tasks, events, birthdays and separate accounts can all be marked with their own color, but the option is buried a few taps deep in the calendar settings. Once assigned, the color stays attached to that category across every view.
Enable Developer Options
If a sync feature, app debugging tool, or advanced network setting is missing from your Oppo phone, it is often hidden behind a menu that is not visible by default. This menu, meant for app testing, stays off unless you specifically trigger it in the phone's build information. Without it enabled, options like USB debugging or forced GPU rendering simply do not appear in Settings.
Turn Display Animations On or Off
If your Oppo phone shows a noticeable animated slide or fade every time you switch apps or open a settings menu, ColorOS window animations are running in the background. These effects look polished but add a small delay to every screen transition, which becomes obvious on busy days or on older hardware. Turning off the animation effects makes windows appear and close instantly instead of sliding into view.
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.
Share Single or Multiple Contacts
Sending someone a contact from your Oppo phone often means retyping a phone number by hand because the built-in Contacts app hides the sharing option behind a long-press gesture. Both single entries and whole groups of contacts can be exported as a vCard or text file, but many users never find the menu that triggers it.