WhatsApp for Realme 9 Pro+

ColorOS aggressively freezes background apps to save battery, which silences WhatsApp pushes until you open the app. Go to Settings > Battery, open WhatsApp and set it to "Allow background activity" / "Don't optimize". Then open Recent apps (the multitasking view), pull down on the WhatsApp card and tap the lock icon so the system stops killing it. Finally check Settings > Notification & status bar > Manage notifications > WhatsApp and make sure notifications and banners are enabled. See how others solved this on Reddit

This "phantom" notification usually means WhatsApp was put to sleep and only synced a partial header before the chat loaded. In Settings > Battery > More settings (or the three-dot menu), turn off "Sleep standby optimization", and set WhatsApp's battery usage to "Allow background activity". After that, fully close and reopen WhatsApp once so it re-syncs all pending messages. See how others solved this on Reddit

ColorOS blocks WhatsApp's overlay and auto-start by default, so incoming calls ring without the full-screen interface. Go to Settings > Apps > App management > WhatsApp > Permissions and enable "Display over other apps". Then open Settings > Apps > Auto-launch (Auto start) and turn WhatsApp on so it can wake itself. Lock WhatsApp in the Recent apps screen as well so the system cannot stop it from waking the display. See how others solved this on Reddit

WhatsApp restores from Google Drive only when the same Google account and the exact same phone number are used during setup, so verify both before tapping restore. Open WhatsApp on the old phone first and force a fresh backup via Settings > Chats > Chat backup > Back up, then on the Realme reinstall WhatsApp, verify the number, and accept the restore prompt before finishing setup. If you skipped that prompt, you must uninstall and reinstall to trigger it again. See how others solved this on Reddit

That prompt comes from ColorOS App Lock, not WhatsApp itself. Go to Settings > Privacy > App lock (on some versions Settings > Password & security > App lock), enter your PIN, and toggle WhatsApp off in the list to remove the lock. To disable it for everything, turn off the App lock master switch on that same screen. See how others solved this on Reddit

OIS only engages in certain modes and lighting, so first update the Camera app and system via Settings > Software update, since several ColorOS patches fixed stabilization bugs. Test it in a steady low-light video rather than bright daylight photos, and clear the Camera cache under Settings > Apps > App management > Camera > Storage usage > Clear cache. If shake persists after a restart, it may be a hardware fault worth raising with a Realme service centre. See how others solved this on Reddit