Set Time Manually
If the clock on your Oppo phone refuses to change no matter what you tap, the phone is still pulling the time from the mobile network. As long as 'Use time from network' stays active, the manual time field is locked or simply not shown inside Date & time. Turning that toggle off is what unlocks the option to type in your own time.
Optimize Battery Consumption
If your Oppo phone drains fast even when you barely touch it, background apps are usually pulling power without you noticing. Oppo phones include a function that scans your usage and shows exactly how much charge you could save, app by app. Knowing which processes it restricts helps you decide if the automatic suggestion fits how you actually use your phone.
Custom Ringtone for Contact Groups
If every incoming call sounds the same, you can't tell whether it's family, work, or a friend without checking the screen. On Oppo phones, contact groups can each carry their own ringtone, separate from the general call sound and separate from per-contact tones.
Reset Advertising ID
Ads on your Oppo phone keep matching your recent searches and app habits a little too closely. That happens because every device carries a fixed Advertising ID that links your behavior across apps for personalized ads. Turning off interest-based ads alone does not remove that link - the ID itself needs a reset.
Filter the Call History List
If your call history on Oppo mixes incoming, outgoing and missed calls together, spotting who you failed to reach gets tedious once the list grows. The phone app hides a filter that narrows the view down to just missed calls. Without it, you end up scrolling through every entry to find what you actually need.
Set Up Fingerprint Unlock
If your Oppo phone still asks for PIN, pattern or password every time you wake the screen, the fingerprint sensor probably is not set up yet. Fingerprint unlock only works once a backup method like PIN or pattern is already active, since ColorOS needs that fallback to register your print. The same fingerprint also works as a shortcut to reset a forgotten lock screen password.
Turn Color Correction On or Off
If reds and greens look almost identical on your Oppo display, or if certain interface elements blend together, a color vision difference such as Deuteranomaly, Protanomaly or Tritanomaly might be affecting how you read the screen. ColorOS includes a built-in correction tool that shifts on-screen colors to make these differences less noticeable, but it only works once the right mode is selected. Leaving it off or set to the wrong mode means icons, charts and notifications can stay hard to distinguish.
Change Security Question for Privacy Password
If you cannot remember the answer to your privacy password security question, you lose the only way to reset a forgotten privacy password on your Oppo phone. ColorOS ties the entire recovery process to that single question and answer, so a weak or forgotten one leaves protected apps and files out of reach. Swapping in a question you will actually remember closes that gap before it becomes a problem.
Turn Auto Brightness On or Off
If your screen keeps getting too dark in bright rooms or too bright at night, the light sensor behind Auto brightness might be misreading your surroundings. Auto brightness is supposed to save battery and reduce eye strain by adjusting the screen on its own, but a dirty sensor, a case covering it, or a stuck setting can throw that off. Once you know where the switch lives, fixing it takes seconds.
Switch Between 12- and 24-Hour Time Format
If your Oppo phone shows the time in 24-hour format but you expect a 12-hour clock with AM and PM, that is the default ColorOS behavior, not a bug. Some apps and widgets even keep displaying 24-hour time after you change the system clock, which confuses a lot of users. The fix sits in the date and time settings, separate from the region or language options.
Set Up Wi-Fi Tethering as a Repeater
If a room in your home barely gets a signal from your router, your Oppo phone can share its existing WLAN connection with other devices as a repeater. Wi-Fi Tethering lets you set a custom network name and password, or you can just keep the default values and connect right away. This only works while your phone stays connected to the source WLAN itself.
Add Trusted Places to Smart Lock
If your Oppo phone keeps asking for a PIN or pattern even at home or in the office, Smart Lock's Trusted Places feature is probably not configured yet. Without a saved location, the phone falls back to your regular screen lock everywhere, including places you visit every day. Trusted Places keeps the device unlocked within roughly 50 meters of a spot you pick, as long as location services stay on.
Set an Alarm with Custom Repeat and Ringtone
On Oppo phones several alarms exist side by side, each with its own repeat pattern, snooze length, vibration and ringtone. When you set up a new alarm or edit an existing one, it is easy to miss where these individual options actually live and end up with the wrong sound or repeat days. This mixes up daily wake-up alarms with one-off reminders.
Volume Buttons Function for Camera
On Oppo phones, pressing a volume button while the Camera app is open takes a photo instead of adjusting the sound level. This happens because Coloros assigns the buttons to shutter control by default, and the same option can be switched to zoom instead.
Turn Personalized Ads On or Off
Every Oppo phone carries a unique Advertising ID that networks use to build a profile from your app usage and browsing habits. If ads keep following you across unrelated apps with oddly specific products, that identifier is the reason. You can either reset this ID for a fresh start or opt out of ad personalization completely.
Adjust Touch & Hold Delay
If long-pressing icons or text on your Oppo feels either too twitchy or too sluggish, the touch-and-hold timing is likely set wrong for your habits. This delay controls how long you need to press before the system registers a touch and hold instead of a normal tap.
Turn Call Vibration On or Off
Every incoming call makes your Oppo phone buzz, even when you already picked a ringtone you like. If that vibration feels distracting, unnecessary at your desk, or drains the battery faster during calls, the toggle for it lives inside your sound settings, not in a separate ringtone menu.
Clear App Cache
If an Oppo app keeps loading outdated images, freezes, or your storage fills up faster than expected, a bloated app cache is often the reason. ColorOS stores temporary files like thumbnails and login data so apps open faster, but old or corrupted cache entries can trigger glitches or slow performance. Clearing the cache removes this leftover data without deleting your photos, documents, or app settings.
Add a Contact Photo
If your contact list on Oppo still shows plain initials instead of faces, calls and messages are harder to scan at a glance. This happens because no image has been linked to that contact yet in the Contacts app. Adding a photo works with an existing gallery picture or a new snapshot from the camera.
Forward a Message on Oppo
Retyping a text just to send it to someone else wastes time, especially when the message contains links or details you cannot easily reproduce. Oppo phones let you forward an SMS straight from the conversation, and you can also send it to a different app instead of another contact.
Turn On/Off Select to Speak
When Select to Speak is active, an extra accessibility icon shows up in the navigation bar, and tapping it lets you highlight any text on screen to have it read aloud. It works similar to TalkBack but does not take over your phone's regular touch controls. If that icon suddenly appears or disappears without you doing anything, the setting may have been toggled by accident during a system update or a shared accessibility shortcut.
Edit Quick Decline Messages
When you reject an incoming call with a quick text, Oppo phones send one of four preset replies like 'Sorry, I can't answer the phone now.' These default lines rarely match how you'd actually respond to family, friends, or coworkers. Coloros lets you rewrite all four texts, but the setting sits inside the phone app rather than Messages.
Search for a Word in a Conversation
Scrolling through a long chat history just to find one message wastes minutes, especially in group chats with hundreds of texts. Oppo's Messages app has a search function that works inside a single conversation, not just across your whole inbox. Every match gets highlighted so you can jump straight to the message you need.
Turn Screen Rotation On or Off
If your Oppo screen refuses to switch to landscape when you turn the phone, or it flips around when you'd rather it stayed still, the Auto-rotate function is usually the cause. This setting depends on the built-in position sensor and can be changed either in the system settings or right from the quick settings panel. Some apps ignore this setting entirely and force their own orientation regardless of what you pick.