Enable High Contrast Text
Small system fonts on Oppo phones can be hard to read in bright light or for users with low vision. The 'High contrast text' option in Accessibility boosts contrast between letters and background without changing the actual font size. If the toggle stays hidden, it usually sits inside a submenu that is easy to overlook.
Add and Manage Words in the Personal Dictionary
If your Oppo keyboard keeps autocorrecting names, abbreviations, or technical terms you actually want it to remember, the built-in Personal dictionary is likely empty or missing those entries. ColorOS lets you store custom words and optional shortcuts so the keyboard suggests them instead of fighting you. This mainly affects people who type industry jargon, nicknames, or non-standard spellings regularly.
Enable App Lock
Anyone who picks up your unlocked Oppo phone can open banking apps, chats, or your gallery without another prompt. Coloros includes an app lock feature that adds a separate privacy password in front of individual apps, but it stays switched off until you activate it. Without this extra layer, sensitive data stays only one tap away.
Add a Wi-Fi Network Manually
If a Wi-Fi network does not show up in the list of available connections, you cannot just tap and connect like usual. This happens when a router hides its SSID broadcast or when the signal is weak enough that Android drops it from the scan results. To connect anyway, you need the exact network name and, if the router uses one, the correct password.
Set Data Usage Billing Cycle Start Date
If your Oppo phone always resets data usage tracking on the 1st of the month, but your carrier bills you on a different day, the numbers in your data usage stats never match your invoice. This mismatch comes from the mobile data limit settings, where the tracking start date is fixed by default. You can align it with your actual billing date instead.
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.
Enable Auto Answer for Incoming Calls
If you rely on a Bluetooth headset while driving or working, missed calls because you could not reach the display in time are a common frustration on Oppo phones. Auto answer lets the phone pick up incoming calls on its own once a headset or headphones are connected. You can also set a short delay before the call gets accepted, so it does not pick up too abruptly.
Turn Usage & Diagnostics On or Off
If your Oppo phone keeps sending usage and diagnostic data to Google without a clear reason, the toggle for it sits deep inside the privacy menu and gets overlooked easily. This data includes device performance details, crash reports and app usage patterns, even though Oppo does not fully disclose everything that gets collected. Turning the option off stops the automatic sharing, but you also lose the small contribution to future Android stability fixes.
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.
Rearrange Quick Settings Icons
If your Quick settings panel feels cluttered or the toggle you reach for most sits on a second screen, the icon order on your Oppo probably still matches the factory layout. ColorOS lets you add, remove and reorder these buttons, but the edit mode is easy to overlook since it hides behind a small pencil icon in the panel itself. Between eight and sixteen icons fit here depending on your model, and a messy order slows down quick access to Wi-Fi, flashlight or Bluetooth.
Turn On/Off Automatic Data Sync
If contacts, calendar entries or photos on your Oppo phone stop updating in the background, the account sync toggle has likely been switched off. This setting controls whether signed-in accounts like Google keep pushing changes to your device without you opening each app manually.
Turn Fingerprint Animation Sound On or Off
Every time you unlock your Oppo phone with your fingerprint, a short confirmation sound plays. In quiet rooms or during meetings this beep can get annoying fast, and some users prefer silent authentication without an audible cue.
Open Eyes Requirement for Face Unlock
If Face Unlock keeps rejecting you even though you are staring straight at the screen, the open eyes requirement in ColorOS is often the cause. This check forces the camera to confirm both eyes are visibly open before it accepts a match. Glasses, sleepy eyes, or bad lighting can make this stricter mode fail more often than usual.
Change Always-On Display Clock Style
If your Oppo phone only shows the time and battery percentage on the Always-On Display, you are missing part of what the feature can actually do. ColorOS also lets you show the date and incoming notifications, but the toggle sits a few taps deep in the display settings and gets overlooked easily.
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.
Delete an Alarm
If your Oppo phone keeps ringing at a time you no longer need, an old alarm is probably still sitting in the Clock app instead of being removed. Alarms pile up fast after schedule changes, trips, or one-off wake-up calls you forgot to clear. Removing them one by one or several at once keeps the alarm list from getting cluttered.
Turn On TalkBack (Accessibility)
If a single tap on your Oppo now selects text and reads it aloud instead of opening the app, TalkBack is likely running. This screen reader changes how taps, swipes, and double-taps work across the whole system. Turning it on or off correctly keeps accidental activation from locking you out of normal navigation.
Delete an SMS Conversation
Deleting a long text thread message by message on ColorOS wastes time when all you want is the whole conversation gone. A quick long-press on the conversation itself skips the manual cleanup and removes every message in it at once.
Turn Call Waiting On or Off
If you miss a second incoming call while already on a call on your Oppo phone, the call waiting feature might be turned off. Some carriers switch it on by default, but the toggle sits in the phone's network settings and you can check or change it yourself.
Archive a Conversation in Messages
When the Messages app on your Oppo phone gets flooded with old chats, the home screen turns into a scroll marathon just to find a recent conversation. Deleting isn't an option if you still need those messages later. Archiving hides a conversation from the main list without touching its content.
Set Default Account for New Contacts
Every time you add a new contact on your Oppo phone, ColorOS asks you to pick a storage account, and that gets annoying fast if you always choose the same one. Switching between your Google account and internal phone storage manually wastes time and can leave contacts scattered across different places. Setting a fixed default account for new contacts removes that extra tap for good.
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.
Select Network Manually
When you cross a border or travel abroad, your Oppo phone keeps searching for its home carrier and can end up on weak or costly foreign signal without you noticing. Automatic network selection ranks carriers by signal strength, not by cost or reliability, which causes dropped calls in border regions. Switching to manual selection lets you pick the exact carrier your phone connects to.
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.