WhatsApp for OnePlus 8T

After the OxygenOS/Android 14 update, registration can stall if the app is out of date or the system is blocking its background data. First update WhatsApp from the Play Store and confirm your date and time are set automatically under Settings > System > Date & time. Then go to Settings > Apps > WhatsApp > Mobile data & Wi-Fi and enable Background data and Unrestricted data usage, and make sure the app has SMS and Phone permissions so it can receive the verification code. If it's still stuck, a clean reinstall (back up your chats to Google Drive first) usually clears a registration loop left over from a major OS upgrade. See how others solved this on Reddit

This is almost always OxygenOS aggressive battery management killing WhatsApp in the background. Go to Settings > Apps > WhatsApp > Battery and choose Don't optimize (or Unrestricted / Allow background activity). On older OxygenOS builds the same control lives under Settings > Battery > Battery optimization. Then open the Recent apps screen, tap the WhatsApp icon and select Lock so the memory cleaner doesn't close it. See how others solved this on Reddit

Check the per-app notification channels first: Settings > Apps > WhatsApp > Notifications, then open the Message and Group channels and confirm Sound is set and Vibration is on for each, since these can reset after an update. Also verify the phone isn't in silent or a scheduled Do Not Disturb / Bedtime mode under Settings > Sound & vibration. If it persists, toggle the affected channel off and back on, or clear WhatsApp's cache via Settings > Apps > WhatsApp > Storage and cache to rebuild the notification settings. See how others solved this on Reddit

WhatsApp needs lock-screen and background permissions that OxygenOS often restricts. Go to Settings > Apps > WhatsApp > Permissions and enable Display over other apps, then under Settings > Apps > WhatsApp > Notifications make sure the Calls channel is allowed to show on the lock screen and pop on screen. Finally set WhatsApp to Don't optimize under Settings > Apps > WhatsApp > Battery so the call screen can launch even when the phone is idle. See how others solved this on Reddit

OxygenOS shows that indicator whenever an app accesses the camera, which WhatsApp does for photos, video calls and Status, so it's expected behavior rather than a security breach. To confirm what WhatsApp is allowed to use, check Settings > Apps > WhatsApp > Permissions > Camera and set it to 'Allow only while using the app'. The small camera dot in the status bar is a system privacy indicator and can't be fully disabled on newer OxygenOS, but knowing it's WhatsApp's video/photo features should reassure you it's normal. See how others solved this on Reddit

If messages stall on Wi-Fi but work on mobile data, a router-level block or a Private DNS setting is usually behind it. Go to Settings > Apps > WhatsApp > Mobile data & Wi-Fi and enable both Wi-Fi and Background data. Then open Settings > Wi-Fi & network > Private DNS and set it to Off or Automatic, and check that WhatsApp isn't being filtered by a VPN or a data-saver. Restarting the router (or trying a different network) confirms whether the block is on that specific Wi-Fi. See how others solved this on Reddit