Change SIM Card Name
On Oppo phones with dual SIM, both cards show up as SIM1 and SIM2 in call logs, texts, and network settings. That makes it tricky to tell a work line apart from a personal number at a glance. You can swap in a custom label for each SIM instead, up to ten characters long.
Enable Face Recognition for App Lock and Private Safe
If Oppo face unlock only works for the lock screen, you might not know it can also protect individual apps and the Private Safe. Many users set up Face once for unlocking the phone and never realize App Lock and Private Safe use a separate toggle in the same menu. Without turning that option on, those areas fall back to a password or pattern even though your face profile already exists.
Auto Turn-Off for Personal Hotspot
If your Oppo phone keeps its Wi-Fi hotspot running long after every device has disconnected, it drains the battery for no reason. ColorOS includes a setting that shuts the hotspot down automatically once nothing has used it for a while. Without that toggle enabled, the hotspot stays active until you switch it off by hand.
Accessibility Menu: Enable or Disable
If you don't see a small round shortcut icon in your navigation bar, the Accessibility Menu on your Oppo phone is switched off. This menu gives quick access to frequently used apps and system functions without digging through several screens. It's especially useful for older users or anyone who wants fewer taps to reach common actions.
Change Preferred Network Type
If your Oppo phone keeps dropping back to a slower connection or refuses to lock onto 5G, the Preferred network type setting is usually the reason. This option tells the modem which network generation to search for first, and a wrong choice leads to dropped calls, sluggish data, or a missing 5G icon. The available options depend on your device model and what your carrier actually supports.
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 On/Off USB-OTG
If a keyboard, mouse or USB stick doesn't get recognized when you plug it into your Oppo phone, USB-OTG is probably switched off. Coloros also disables the feature automatically after about ten minutes without a connected accessory, so it can look off again even though you enabled it before.
Set a Screen Lock with Pattern, PIN or Password
If your Oppo phone still opens with a simple swipe, anyone who picks it up can read your messages, photos and banking apps without entering a code. ColorOS keeps the pattern, PIN and password options tucked inside a security menu that many people never open, so the phone stays unprotected by default. Without this lock active, features like remote find-and-wipe also lose part of their effectiveness.
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.
Add Widgets to the Home Screen
If your Oppo home screen only shows app icons and folders, you are missing widgets that display live info like weather, calendar events, or battery status. Many users never spot the widget menu because it does not sit in the regular app drawer. Both system apps and many installed apps offer their own widgets in different sizes.
Change Screen Lock PIN, Password or Pattern
Switching from a pattern to a PIN or picking a fresh password on an Oppo phone does not mean wiping the lock screen and starting over. Coloros keeps your fingerprint and face data untouched while you swap the unlock method, but the actual option to change it sits one level below the main lock screen menu. Many users only find the reset entry and assume they have to set up biometrics again.
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.
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.
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.
Add a Keyboard Language on Gboard
If you type in more than one language, the default Gboard setup only offers your phone's system language and blocks you from typing accented characters or a different script. Switching the whole system language just to write a message is not necessary. Gboard can hold several languages at once and let you switch between them while typing.
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.
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.
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.
Enable Mobile Data During Calls on Secondary SIM
If your internet drops the moment you pick up a call on your primary SIM, the secondary SIM's mobile data connection is probably not allowed to take over. On dual-SIM Oppo phones this behavior is controlled separately from your normal data SIM selection, so browsing can stall mid-call even though you have a working data plan on the other slot.
Allow Unlimited Data for Apps in Data Saver
When Data saving mode is on, your Oppo phone cuts mobile data access for most apps in the background, which often causes missed notifications or apps that only load content over Wi-Fi. You can still whitelist specific apps so they keep full data access even while data saving stays active for everything else.
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.
Screen Timeout Settings
If your Oppo display locks itself after just a few seconds while you are still reading or filling out a form, the screen timeout is set too short for how you use the phone. Coloros applies a default auto screen off value that favors battery savings over convenience. The duration can be raised or lowered anywhere between a few seconds and half an hour.
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.
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.