Turn Mobile Data On or Off
If apps stop loading anything once you leave Wi-Fi range on your Oppo phone, mobile data is probably switched off, or the wrong SIM is set for internet use on a dual-SIM device. ColorOS routes all cellular internet traffic through one single toggle, so a wrong access point can block traffic even when that toggle looks enabled. Checking the actual mobile data status first saves you from chasing the wrong problem.
Turn Super Power Saving Mode On or Off
When your Oppo phone is stuck at a low charge and you need it to last through the rest of the day, Super power saving mode cuts almost everything non-essential. It switches the display to dark mode, limits which apps can run in the background, and pauses syncing to squeeze out extra runtime. That trade-off means notifications, widgets, and most third-party apps stop behaving normally until you switch the mode off again.
Turn Wi-Fi On or Off
If your Oppo phone won't connect to your home router or a public hotspot, the Wi-Fi radio itself might be switched off or stuck in a weird state. This also happens after a system update, when the toggle looks active but no networks show up. Before troubleshooting a specific network, it helps to confirm Wi-Fi is properly enabled or fully disabled first.
Turn On-body Detection On or Off
Your Oppo phone stays unlocked the whole time you are carrying it, even after you slide it into a pocket or bag. That is On-body detection at work, a Smart Lock feature that reads motion sensors instead of checking who is actually holding the device. If someone else picks up your phone while it is still moving, they get straight in without a PIN or fingerprint.
Add Emergency Contacts for Emergency SOS
If Emergency SOS or emergency SMS on your Oppo phone only reaches the default 112 number, no personal emergency contact is stored yet. Without at least one saved contact, alerts and location messages during an SOS trigger won't go out to anyone you know.
Turn On/Off Screen-off Gestures
If double-tapping the display or drawing a quick O or V symbol does nothing while the screen is off, Screen-off gestures are probably disabled on your Oppo phone. These gestures let you open the camera, toggle the flashlight, or wake the display without pressing the power button. A single option in the convenience settings controls all of them.
Turn Bluetooth Tethering On or Off
If a paired device cannot reach the internet through your Oppo phone, Bluetooth tethering might be switched off or the device connection was never approved. This function shares your mobile data over Bluetooth instead of Wi-Fi hotspot or USB, which helps laptops without hotspot support and saves battery compared to Wi-Fi sharing. Each paired device needs the option allowed on its own before data actually flows.
Turn Assisted Dialing (Roaming Assistant) On or Off
Calling contacts while traveling can fail on an Oppo phone because Assisted Dialing quietly inserts a country code you never asked for. This roaming assistant reacts whenever the network detects you outside your home country, even for numbers that would normally dial fine without a prefix. If that auto-added code breaks the call or reaches the wrong number, the fix is to switch the feature off and dial manually.
Ringtone Volume Settings
If your Oppo phone rings too quietly or too loudly during calls, but notification sounds seem fine, you are likely looking at two separate volume sliders. Ringtone volume and notification volume run on independent controls, so adjusting one does not touch the other. This mix-up leads many users to think their phone volume is broken when it is just set on the wrong slider.
Show or Hide World Clock Widget on Home Screen
Added several cities to the World Clock app but can't get them onto your home screen? On Oppo phones the World Clock only appears as a home screen widget once a specific system toggle is switched on, otherwise the app stays hidden from the widget drawer. If the widget refuses to show up, or you want to remove it without deleting your saved cities, one setting in Date & time decides that.
Turn Notification Badges On or Off Per App
If notification badges do not show up on some app icons on your Oppo home screen, the per-app Badge toggle is likely switched off. ColorOS only displays a small dot instead of a number, and each app has its own switch tucked inside the notification settings. Missing dots often get mistaken for a wider notification bug when it is really just this one setting.
Set Date and Time Automatically
If your Oppo phone shows the wrong time or date after a SIM swap or a trip abroad, network time sync has likely been switched off. This setting decides whether ColorOS keeps the clock updated from your carrier network or waits for you to enter it manually.
Turn Lock Screen Notifications On or Off
If notifications keep showing full message previews on your Oppo lock screen, the 'Lock screen notifications' option is likely set to display title and body for that app. ColorOS handles this setting per app, so one app can stay silent while another still alerts you. Left on the default, anyone who glances at your phone can read message content before you unlock it.
Add Contact to Home Screen
Calling a frequent contact on your Oppo phone often means opening the Phone app, tapping Contacts, and scrolling through the list every time. A home screen shortcut skips all of that and jumps straight to the contact's detail page, ready to call or message in one tap. Useful for family, work, or anyone you contact daily.
Show or Hide Birthdays in Calendar
Birthdays from your contacts do not always show up in the calendar app on an Oppo phone, even though the dates are stored correctly in your Google account. Usually the birthday calendar layer is just switched off or the sync has not caught up yet. This affects anyone who wants a quick overview of upcoming birthdays without opening the contacts app separately.
Change Google Backup Account
If your phone backs up to the wrong Google account, storage on that account can fill up fast or you may not find your backup when setting up a new device. This mix-up usually happens after switching Google accounts on the phone without updating the backup destination in Storage and Backup. The good news is the backup account is not locked in and can be swapped at any time.
Resize a Widget on the Home Screen
If a widget on your Oppo home screen only shows a fixed size and won't stretch right after you add it, that's expected. Coloros only unlocks resize handles once the widget is already sitting on the screen, not while you're still picking it from the widget drawer. That's a different flow than on stock Android, where some launchers let you size a widget before you even drop it.
Schedule Dark Mode Automatically
Switching Dark mode on and off by hand every day gets old fast, especially if you forget it at night and the screen stays bright. ColorOS lets you set fixed times so light and dark mode change on their own, but the option is easy to miss inside the display settings.
Set Up a VPN Connection
If your company or university hands you server details instead of a ready-made VPN app, your Oppo phone needs a manual profile entered directly in the system settings. Without the right protocol, server address and login data, the connection fails silently or drops right after you save it. This is different from installing a VPN app from the Play Store, which handles the setup on its own.
App Download Preference (Wi-Fi or Mobile Data)
New apps from the Google Play Store only download over Wi-Fi on your Oppo phone by default, and a large install can sit there waiting instead of finishing over mobile data. This is controlled by a setting inside the Play Store itself, not by Coloros. You can allow downloads over mobile data at any time, or set the Play Store to ask you every single time before it uses cellular data.
Format SD Card
If an Oppo phone keeps warning that a memory card is unreadable or unsupported, the card usually needs to be formatted before it works with photos, apps or music. Formatting is also the fastest way to wipe a used SD card clean before selling the device or reusing the card elsewhere. Every file on the card gets deleted permanently, so back up anything important first.
Turn Camera Watermark On/Off
If every photo or video from the camera app carries an unwanted overlay with the phone model, date, time, or location, ColorOS added that watermark automatically. On some Oppo phones the setting stays active after a reset or software update. It only affects the built-in Camera app, not third-party apps or the gallery.
Create a Photo Album
When photos and screenshots keep piling up in one long timeline, finding a specific shot becomes a scroll marathon. The Gallery app on Oppo phones lets you group images and clips into albums, but ColorOS keeps the feature basic. You cannot pick a cover image, rename categories after the fact in every version, or nest one album inside another.
Display Short Calendar Entries as 30-Minute Blocks
When a day view is packed with quick appointments, entries lasting just a few minutes can shrink into thin slivers that are hard to read or tap. The Google Calendar app on Oppo phones has a display option that stretches these short entries so they take up the same visual space as a standard half-hour slot. Without it enabled, brief tasks and reminders often get buried between longer events.