Allow or Deny System Settings Permission
Some apps on your OnePlus phone ask to change system settings on their own, like the wallpaper or ringtone. This permission only covers those convenience settings and has no effect on security features such as the screen lock.
Switch Keyboard Language While Typing
Typing a message that mixes two languages and the keyboard keeps autocorrecting the wrong one gets annoying fast on a OnePlus phone. Most keyboards let you swap languages mid-sentence, but the trigger for that switch is not always obvious. Some people tap a small globe icon near the space bar, others just hold the space bar down and get nothing.
Change App Icon Shape and Style
If every app icon on your OnePlus home screen still looks like a plain square or circle, the icon shape setting is likely still on the default option. Switching between the pre-installed icon packs or a downloaded one changes the outline of every app symbol at once, but the option is easy to miss inside the home screen settings. Some downloaded packs also only apply partially if a step gets skipped.
Switch Between User Accounts
If several people share the same OnePlus phone, jumping into full system settings just to swap accounts feels slow. Each user profile keeps its own apps, wallpaper and data separate, so picking the wrong one mid-task can mean losing your open apps or notifications. The switch actually lives in the quick settings, not buried in a settings menu.
Change Calendar View
By default, the Calendar app on OnePlus phones opens with a combined overview of every added account, which makes it hard to see a full month at a glance. If you only need a quick daily rundown or a compact weekly plan instead, the current view setting is working against you. This applies to all accounts synced into the app, not just one calendar.
Change Default Messaging App
If your OnePlus keeps opening the stock Messages app instead of the messenger you actually installed, the phone is still pointing to the old default handler. Notifications, quick replies and even the share sheet stay tied to whichever app holds that role, no matter which one you prefer to type in. Switching the default only takes a moment, but the option sits a few menus deep in the system settings.
Remove an Account on OnePlus
Old logins pile up in the account overview on your OnePlus phone and make it harder to spot the ones you actually use. Removing an account deletes its login credentials and any data that was synced through it, while the app it belongs to stays installed. This matters most for accounts like WhatsApp or Facebook, where contacts, messages, or cloud-synced content tied to that login disappear from the device once it's removed.
Enable or Disable Double-Click Power Button Camera Launch
If double-clicking the power button on your OnePlus keeps launching the camera by accident, or nothing happens when you try it, the Double click the power button setting is set to the wrong option. This shortcut works from the lock screen and while the phone is unlocked, and it also decides whether you can swipe in to check your latest photo or video right after taking it.
Enable or Disable Pop-up on Keypress
Every tap on the on-screen keyboard shows a small popup with the letter you just pressed, and on some OnePlus phones this becomes distracting while typing fast in WhatsApp or email. The feature comes from Gboard's key preview setting, not from OxygenOS itself. You can turn it on or off anytime without touching autocorrect or other typing settings.
Change Default Homepage in Chrome
If Chrome always opens to the same news feed with shortcuts and suggested articles when you launch it, the browser is using a preset homepage instead of a site you picked yourself. On OnePlus phones this default start page ships active out of the box and keeps loading until you override it. You can swap it for any web address you actually use every day.
Enable or Disable Mobile Hotspot
If your laptop or tablet cannot see your OnePlus phone's WiFi hotspot, or the connection keeps dropping, the toggle for it is not in the quick settings panel on OxygenOS. It sits inside the network menu together with the hotspot name and password. Leaving it on unnecessarily also drains the battery faster than a normal WiFi connection.
Allow App Installs from Unknown Sources
Trying to install an APK outside the Google Play Store and getting blocked on your OnePlus phone? Your browser or file manager needs explicit permission before it can install anything from outside the store. Without that permission enabled, Android refuses the installation as a security precaution.
Adjust screen brightness manually
If the screen on your OnePlus phone feels too dim indoors or too bright at night, automatic brightness is often making the call instead of you. Once Adaptive Brightness kicks in, the slider can jump around on its own, making it hard to lock in a comfortable level. Setting the brightness by hand gives you a fixed, predictable result every time.
Enable or Disable Accessibility Menu
If the Accessibility Menu button is missing from your navigation bar, shortcuts for Assistant, power control, volume and recent apps are not available in the enlarged panel. The feature depends on a separate permission toggle, so switching it once in the wrong place leaves it off. Turning it back on restores the larger on-screen controls for anyone who relies on simplified navigation.
Fullscreen app display settings
When an app opens with black bars on top and bottom instead of filling the whole screen, OxygenOS has not whitelisted it for fullscreen display. This usually happens with less common or older apps that were never updated for taller aspect ratios. A quick toggle in the display settings fixes the layout without needing an app update.
Turn Do Not Disturb On or Off
Calls keep ringing through even though you switched on silent mode, or notifications stay muted long after you meant to turn them back on. On OnePlus phones, Do Not Disturb handles sounds, vibrations and call rejection separately from the regular ringer switch, so toggling one does not always affect the other. Knowing where this setting actually lives in Oxygenos prevents missed alerts or unwanted interruptions.
Enable or Disable Google Voice Typing
If dictation stays greyed out on your OnePlus keyboard or the microphone icon simply refuses to appear, Google voice typing is likely switched off in your keyboard settings. The feature converts spoken words into text for messages, emails and notes, but it only works once it is active for your virtual keyboard. A locked device after a restart can also block access until you unlock it first.
Enable or Disable a SIM Card
On a Dual SIM OnePlus phone, one line sometimes needs to be shut off completely instead of just switched to the background. Turning off a SIM card stops it from receiving calls and texts right away, while mobile data and messaging priorities move automatically to the remaining card. This is useful when a second line sits unused for a while but should not be removed from the tray.
Disable Lock Screen Password
If your OnePlus phone still asks for a pattern, PIN or password every time you wake the screen, the lock screen security feature is still active. This also keeps fingerprint and face unlock tied to that passcode, so removing it wipes any saved biometric data. You need your current unlock method on hand before you can turn the request off.
Add a Printer Manually by IP Address
If your OnePlus phone does not detect your printer automatically, the built-in Default Print Service probably does not recognize your model. This happens with older or less common printers that are not listed in the supported device catalog. You can still connect the printer over your local network by entering its IP address directly.
Enable or Disable Switch Access
If touch input is not an option for you, controlling a OnePlus phone can feel out of reach. Switch Access lets you navigate, select items, scroll and type using an external switch connected over USB or Bluetooth instead of tapping the screen. Turning the feature on or off happens in the accessibility settings, not through a hidden gesture.
Enable or Disable Battery Saver
When your OnePlus phone drains faster than usual, background apps, animations and sync jobs are often still running at full power. Battery Saver throttles that activity to stretch the remaining charge, and it can also switch on by itself at a set time, for example overnight while the phone is idle.
Add Members to a Contacts Group
A label or group in the OnePlus Contacts app stays empty until you actually assign people to it. Many users create a group but then struggle to find where to add contacts afterward, especially when they want to select several people at once instead of adding them one by one.
Assign a Custom Ringtone to a Contact
When your phone rings, you often can't tell who's calling until you glance at the screen. OnePlus lets you assign a distinct ringtone to individual contacts, including your own MP3 files, so specific callers stand out just by the sound.