OnePlus Common Problems — Fix Guide

OnePlus devices are notorious for aggressive battery management that kills background apps, causing missed notifications and poor app performance.

Disable Battery Optimisation Per App

1. Open Settings > Battery > Battery Optimisation
2. Tap the dropdown at the top and select All Apps
3. Find the app you want to protect (e.g. WhatsApp, email)
4. Tap it and select Don't Optimise
5. Repeat for each important app

Enable Auto-Launch

1. Go to Settings > Apps > App Management
2. Select the app > tap Auto-Launch
3. Toggle Allow Auto-Launch on
4. This prevents the system from stopping the app when you close it

OxygenOS 14+ / ColorOS Settings

1. Go to Settings > Battery > More Battery Settings
2. Toggle off Sleep Standby Optimisation if notifications are delayed overnight
3. Check Optimised Charging — this delays charging to 100% based on your habits

If notifications arrive late or only when you open the app, OnePlus battery management is almost certainly the cause. Follow these steps in addition to Method 1.

1. Go to Settings > Notifications & Status Bar
2. Ensure the app has Allow Notifications enabled
3. Tap into the app and enable Priority or Urgent delivery
4. Go to Settings > Apps > App Management > [App] > Battery Usage
5. Select Allow Background Activity
6. Ensure Auto-Launch is enabled (see Method 1)

Lock App in Recent Apps

1. Open the app, then go to your Recent Apps screen
2. Tap the three-dot menu on the app card (or long-press on older OxygenOS)
3. Select Lock — this prevents the system from clearing it

OnePlus AMOLED screens can sometimes show a green tint at low brightness, uneven colour, or excessive warmth. Here's how to calibrate.

1. Go to Settings > Display & Brightness > Screen Calibration
2. Try switching between Vivid, Gentle, and Cinematic modes
3. In Vivid mode, use the colour temperature slider to adjust warmth
4. For advanced control, tap Advanced Settings to tweak individual colour channels

Fix Green Tint at Low Brightness

1. Go to Settings > Display & Brightness
2. Toggle off DC Dimming if available — this can cause tint at low brightness
3. Check for a software update — OnePlus has released tint fixes via OTA updates
4. If the tint is severe and consistent, contact OnePlus support — it may be a hardware defect covered under warranty

Refresh Rate Settings

1. Go to Settings > Display & Brightness > Screen Refresh Rate
2. Select Standard (60Hz) to save battery, or High (120Hz) for smoothness
3. If the screen flickers, try switching between these modes and restarting

OnePlus devices often close background apps too aggressively, causing apps to reload every time you switch. This is a RAM management issue.

1. Enable Developer Options: go to Settings > About Phone and tap Build Number 7 times
2. Go to Settings > System Settings > Developer Options
3. Find Don't Keep Activities — ensure this is OFF (turning it on kills apps immediately)
4. Find Background Process Limit — set to Standard Limit (not a lower number)

RAM Expansion (Virtual RAM)

1. Go to Settings > About Phone > RAM
2. If your device supports it, enable RAM Expansion
3. Select the amount of storage to use as virtual RAM (2-5 GB recommended)
4. Restart your phone for the change to take effect

In-display fingerprint scanners on OnePlus devices can become unreliable over time. Here's how to improve recognition accuracy.

1. Go to Settings > Security & Lock Screen > Fingerprint
2. Delete all existing fingerprints
3. Re-register your primary finger — press firmly and cover the entire sensor area
4. Pro tip: Register the same finger twice as two separate entries — this dramatically improves recognition
5. When registering, scan the edges and tip of your finger, not just the centre

Screen Protector Considerations

1. Tempered glass protectors can interfere with optical fingerprint sensors
2. If you've applied a new screen protector, re-register your fingerprints
3. Use a screen protector specifically designed for in-display fingerprint compatibility
4. Go to Settings > Display > Touch Sensitivity — if available, enable increased sensitivity

Some OnePlus users experience WiFi dropping, slow mobile data, or frequent disconnections. This is often caused by battery optimisation affecting network components.

1. Go to Settings > WiFi & Network > WiFi
2. Long-press your network > Forget, then reconnect
3. Go to Settings > System Settings > Reset & Erase > Reset WiFi, Mobile & Bluetooth
4. Restart your phone after the reset

Prevent WiFi from Dropping During Sleep

1. Go to Settings > WiFi & Network > WiFi > Advanced (or three-dot menu)
2. Set Keep WiFi on during sleep to Always
3. Disable Intelligent Network Switch (this auto-switches between WiFi and mobile data)
4. In Developer Options, enable WiFi Scan Throttling to reduce connection drops

The physical alert slider is a signature OnePlus feature. Here's how to customise what each position does.

1. Go to Settings > Sound & Vibration > Alert Slider (or Settings > Buttons & Gestures > Alert Slider)
2. The three positions are: Silent (bottom), Vibrate (middle), Ring (top)
3. Customise vibration patterns and notification behaviour for each mode
4. If the slider feels loose or isn't registering correctly, try a restart — a software glitch can cause the wrong mode to activate