Show Device Certification Info
If you need to confirm that your Oppo phone carries the right regulatory marks for your country, the certification numbers are not printed anywhere on the case. Retailers, customs offices or repair shops sometimes ask for proof of a CE, R-NZ or FCC-ID mark before accepting a return, import or warranty claim. That information sits inside a dedicated settings screen instead of the box or manual.
Turn Web Link Previews On or Off
When you paste a website link into a text, Messages sometimes shows a thumbnail with the page title and image, and sometimes just plain text. This depends on a setting inside the Messages app that decides whether previews load for every link or get skipped entirely. If previews suddenly stopped appearing or you want to disable them for privacy reasons, this option is the one to check.
Adjust Smart Sidebar Opacity
When the Smart Sidebar floating bar sits fully opaque on the edge of your screen, it can cover subtitles, icons, or app content behind it. On Coloros, the handle transparency is adjustable, so you can make it blend in during games or video playback instead of standing out. Left at the default level, many users find the handle too bold for everyday use.
Turn Next-word Suggestions On or Off
If Gboard keeps guessing the wrong next word or the suggestion bar feels like it slows down typing instead of speeding it up, the Next-word suggestions feature is behind it. It predicts your next word from what you typed before, and a quick tap on the space bar inserts that guess automatically.
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.
Turn On/Off Autofill Service
If a form keeps suggesting old addresses, outdated passwords, or the wrong Google account whenever you tap a field, the Autofill service on your Oppo phone is likely still linked to a provider you no longer want active. This often happens after switching Google accounts or installing a password manager that never became the default. Turning the current service off - or picking a different one - is the only way to stop the wrong data from popping up.
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.
Adjust Touch & Hold Delay
If long-pressing icons or text on your Oppo feels either too twitchy or too sluggish, the touch-and-hold timing is likely set wrong for your habits. This delay controls how long you need to press before the system registers a touch and hold instead of a normal tap.
Turn On/Off Select to Speak
When Select to Speak is active, an extra accessibility icon shows up in the navigation bar, and tapping it lets you highlight any text on screen to have it read aloud. It works similar to TalkBack but does not take over your phone's regular touch controls. If that icon suddenly appears or disappears without you doing anything, the setting may have been toggled by accident during a system update or a shared accessibility shortcut.
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.
Turn On/Off Silent Mode
If your Oppo phone stays quiet during calls and texts but the alarm or music still plays at full volume, Silent mode is likely active. It mutes incoming calls and SMS notifications and can optionally allow vibration, while media and alarm volume stay untouched. Many users mistake this for a broken speaker or a vibration setting that will not turn off.
Number Row On/Off
Typing numbers on the Gboard keyboard normally means holding a key or switching to the symbol page, which slows down anything with PINs, prices or codes. On Oppo phones running Coloros you can pin a dedicated number row above the letters instead. The trade-off is a taller keyboard that leaves less room for the app underneath.
Set Monthly Data Usage Warning
On Oppo phones you can only define a single data warning that shows up once after you cross the limit you set. The mobile data limit has to be switched on first, otherwise the alert never fires. This data warning only exists from ColorOS 7 (Android 10) onward, so older devices wont show the option at all.
Auto Switch to Ear Receiver Setting
During calls, your Oppo phone can automatically move audio from the speaker to the earpiece as soon as you lift it to your ear. If this motion control misfires, calls stay on speaker in public or jump to the earpiece when you actually wanted to keep them on speaker, usually because Auto switch to ear receiver is set the wrong way.