SMS Delivery Reports: Turn On or Off
If you can never tell whether a text actually reached the other person, your Oppo phone probably has delivery confirmations switched off. The feature that sends you a status update once an SMS lands on the recipient's device sits inside the Messages app and is disabled out of the box. On dual SIM phones it also behaves differently depending on which SIM sent the text.
Adjust Display Size
If app icons, images, or entire menus look too small or too large on your Oppo phone, adjusting the font size alone will not fix it. Display size scales interface elements independently from text, changing how much content fits on the screen at once. Getting this setting wrong can make apps feel cramped or leave icons oversized on the home screen.
Autospace After Punctuation Toggle
Typing fast on your Oppo phone and ending up with double spaces or missing spaces after periods and commas? Gboard's autospace feature inserts a space automatically after punctuation, which can clash with your own typing habits or with pasted text that already has spacing.
Schedule Always-on Display
If your Oppo phone runs the Always-on Display around the clock, it keeps drawing power even while you sleep or leave the phone in a drawer. ColorOS lets you limit the Always-on Display to a fixed time window instead of showing it non-stop. Without a schedule, the clock and notifications stay visible on the lock screen at every hour, day and night.
Add a Birthday to a Contact
Saving a contact's birthday on an Oppo phone looks like a small task, but many users expect ColorOS to send a reminder afterward. That does not happen automatically, and the date only sits inside the contact card until you check it yourself. Knowing where the birthday field actually lives saves you from digging through the wrong menus.
Change Keyboard Layout
Typing the wrong characters on your Oppo phone usually means the keyboard layout does not match the language you expect. German input calls for QWERTZ, English for QWERTY, and depending on the region you might need AZERTY, Dvorak, Neo2 or Colemak instead. Gboard on Coloros lets you add or switch these layouts per language, but the option sits several menus deep and is easy to miss.
Move Widgets on the Home Screen
A widget on your Oppo home screen sometimes ends up on the wrong page or crammed between app icons where it does not belong. A short tap just opens the widget or its app instead of letting you drag it. Knowing how long to hold before moving it keeps the widget from jumping back or landing in the wrong spot.
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 Do Not Disturb On or Off
If your Oppo phone stays completely silent even for important calls, or if it keeps buzzing when you actually need quiet, Do Not Disturb is likely misconfigured. The mode mutes sound and vibration system-wide and can hide notifications or let selected exceptions through, so getting the toggle and its options right matters. Many users only find the switch by accident because it sits inside the general sound settings rather than its own menu.
Allow or Block App Autostart
If your Oppo phone feels slow right after a restart, too many apps are probably launching in the background automatically. Each app that keeps an autostart permission keeps running silently, draining battery and RAM before you even open it. ColorOS has a dedicated manager for this, but it is easy to miss and even easier to leave misconfigured.
Send an MMS Message
If you attach a photo, video, or contact card to a text message on your Oppo phone, it stops being a plain SMS. The Messages app quietly converts it into an MMS, which can change how it sends, how big it can be, and whether your carrier bills it differently. Not realizing this switch happened is usually why an attachment seems stuck or never arrives.
Clear App Data to Reset an App
If an app on your Oppo phone keeps glitching, shows an outdated login, or wont sync even after a restart, clearing the cache alone often wont fix it. App data stores settings, saved files, login sessions and progress, so removing it resets the app to its original, freshly-installed state. That solves stubborn app bugs, but it also means everything the app saved locally is gone.
Mark a Contact as Favorite
Scrolling through a long contact list every time you need to reach the same few people gets tedious fast on an Oppo phone. Marking a contact as a favorite pins them to a quicker spot in Phone and Contacts, and favorites can also double as a group exception for Do Not Disturb or a whitelist against call blocking.
Auto-Enable Power Saving Mode at a Set Battery Level
If your Oppo phone only switches to power saving mode after you tap it manually, the battery often drops further than you would like before you notice. Coloros can trigger power saving mode on its own once the battery reaches a level you choose, anywhere from 5 to 75 percent. Without this setting turned on, you have to remember to activate the mode yourself every time the charge gets low.
Set Camera Timer for Photos and Videos
Group photos rarely work when someone has to hold the phone and jump into frame at the same time. Oppo's Camera app hides a self-timer that delays the shutter for a few seconds, but the option sits inside a menu instead of the main viewfinder. Without it, group shots often end up blurry or missing a face.
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.
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.
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.
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.