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Oppo

Guides for Oppo Realme C25Y

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Calls & Messages2

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.

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Other

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.

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Calls & Messages

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.

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Calls & Messages2

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.

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Display & Home Screen2

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.

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Battery & Power

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.

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Network & Connectivity2

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.

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Notifications & Focus2

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.

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Apps & Installation2

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.

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Display & Home Screen2

Adjust Screen Brightness (Manual & Automatic)

When the screen stays too dim indoors or turns painfully bright at night, auto-brightness on your Oppo phone is likely misreading the light around you. The quick slider in the notification shade only gives a rough fix, and many owners never open the full display settings where the actual control sits. Switching between automatic and manual mode changes how reliably the screen matches the room.

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Calls & Messages2

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.

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Apps & Installation2

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.

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Calls & Messages

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.

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Calls & Messages2

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.

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Battery & Power2

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.

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Photo, Video & Media

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.

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Storage & Backup2

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.

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Security & Privacy

Add Emergency Information

If you collapse or end up in an accident, paramedics often can't unlock your phone to check your blood type, allergies, or medications. Oppo lets you store that medical profile so it shows up during an SOS call, no passcode needed. Without filling it in, first responders only see your name and photo, not the details that actually matter in an emergency.

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Calls & Messages2

Send an SMS Text Message

If your Oppo phone defaults to a chat app and you can't find a plain SMS option, the native Messages app is often overlooked once internet messengers take over daily chats. This leaves some users unsure where to start a new text conversation or how to reach a contact who does not use a messaging app. A quick look at the Messages app clears up where the SMS function actually lives on Coloros.

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System & Settings2

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.

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Calls & Messages

Set an Alternate Calendar for Dates

Dates in the Calendar app only show up in the Gregorian format, even though you need a Chinese, Hebrew, or Hijri reference for religious or cultural events. This happens because the alternate calendar option is turned off by default and depends on Google Calendar being installed. Without it, Coloros only displays the classic calendar view.

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Photo, Video & Media2

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.

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Battery & Power2

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.

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Notifications & Focus

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.

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