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 On/Off Game Space
If calls still ring through during a match or notification banners keep popping up over your game, Game Space is probably switched off or one of its assistant options got disabled. This toggle controls whether Oppo's game launcher actively manages calls, alerts and performance while you play. Getting it wrong either way means either constant interruptions or a launcher that keeps popping up when you do not need it.
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.
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.
Set Up a Proxy Server for Wi-Fi
If you want to browse without exposing the real IP address of your Oppo phone, a proxy server routes your traffic through a different address. Without one set up, every app and website still sees your actual connection details. A proxy only works once you are already connected to a Wi-Fi network.
Turn On or Off Large Mouse Pointer
When you plug an external mouse into your Oppo phone, the default pointer often gets lost on busy wallpapers or in split-screen mode. This makes precise taps and drags harder, especially on bigger displays or when the phone is mirrored to a monitor. A visibility setting inside Accessibility controls exactly this, but most people never find it.
Unarchive a Conversation in Messages
If a chat suddenly disappears from the Messages home screen on your Oppo phone, it usually was not deleted but moved to the archive. Archived conversations stay hidden until you pull them back manually, so incoming texts from that contact can go unnoticed. This mostly happens after swiping a chat away or tidying up the inbox.
Move Apps and Files to an SD Card
When internal storage on your Oppo phone runs low, photos, videos, and even some apps stay stuck on the device even though an SD card is installed. Coloros includes a built-in transfer tool, but it only works with certain file types and not every app is eligible for the move. Knowing which data can actually shift to the memory card helps you free up space without deleting anything you need.
Custom Ringtone for a Contact
If your Oppo phone plays the same generic ringtone no matter who calls, you can't tell an important contact from a random number without looking at the screen. ColorOS lets you swap in a custom sound for individual contacts instead of relying on the default tone. This works with your own audio files, not just the built-in ringtone list, and it stays independent from Focus or Do Not Disturb rules.
Set Recovery Email for Privacy Password
Locked out of your app lock or private safe because you forgot the privacy password? Without a recovery email saved in advance, Oppo gives you no way to reset it. Once an address is linked, the 'Forgot password' option lets you create a new privacy password.
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.
Turn Keyboard Sound On or Off
Typing without any click sound, or suddenly hearing it after a system update, can be confusing since Oppo phones don't have a dedicated keyboard sound toggle inside ColorOS itself. The setting actually lives inside the Gboard app that most Oppo devices use by default. On many devices this sound is turned off from the start, leaving you unsure where to look for it.
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.
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.
Remove a Keyboard Language from Gboard
If you added several keyboard languages to Gboard on your Oppo phone, swiping through them or long-pressing the spacebar to switch gets tedious fast. Unused languages also clutter the language switcher and can throw off autocorrect suggestions. The cleanup option sits inside the keyboard app itself, separate from the general system language settings.
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.
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.
Access Scientific Calculator Functions
If the Calculator app on your Oppo phone only shows basic addition and multiplication, functions like sine, cosine and tangent seem to be missing entirely. Many users assume Coloros ships without a scientific mode, when it is actually built into the same app and just hidden from view. This becomes a problem the moment you need quick trigonometry or advanced math on the go.
Show or Hide Holidays in Calendar
If your Oppo calendar is suddenly full of public holidays you never asked for, or they vanished and you want them back, the built-in Google calendar sync is the reason. The holiday data comes straight from the region set in your Google account, not from a manual list you control. A single toggle in the calendar menu decides whether these entries show up at all.
Turn Data Saving On or Off
If background apps on your Oppo phone suddenly stop syncing or notifications arrive late, Data Saving mode is likely blocking their mobile data access. Even apps you are actively using can load slower or skip previews and thumbnails while the mode is active. This setting sits inside the mobile data menu and is easy to miss when troubleshooting connectivity issues.
Change Ringtone
Stuck with the same default ringtone on your Oppo phone and want something else for calls? Coloros lets you pick from built-in tones, but on dual SIM devices each SIM number can carry its own separate sound. Missing this per-SIM setting is why some calls still ring with the wrong tone even after changing it once.
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.
Change Alarm Volume
On Oppo phones running ColorOS, the alarm volume is one shared setting for all alarms, not something you adjust per individual alarm. If one alarm feels too quiet or too loud, you cannot fix it in isolation without affecting every other alarm you have set.