WhatsApp for Oppo Reno 12 Pro

WhatsApp has a built-in iOS-to-Android transfer. On the Reno 12 Pro, install WhatsApp and start the setup, verify the same phone number, and when prompted to 'Move chats from iOS' a QR code appears. Open the camera on your iPhone (which must already have WhatsApp installed and updated) and scan that QR code, then keep both phones unlocked, connected to power, and joined by a USB-C cable as instructed. Note this transfer needs the official cable connection, not Wi-Fi, and it cannot pull from an iCloud backup. If it fails, the only fallback is to start fresh on Android, since iCloud chat backups can't be restored onto ColorOS. See how others solved this on Reddit

This is usually ColorOS suspending WhatsApp in the background. Go to Settings > Battery > Power saving options (or App battery management), find WhatsApp and allow background activity / set it to not be optimized. Then long-press the WhatsApp icon, open App info, and make sure background activity is permitted. It also helps to lock WhatsApp in the Recent apps tray so ColorOS keeps it running. Once it can run in the background, the conversation list reorders correctly as new messages arrive. See how others solved this on Reddit

ColorOS power management is the main culprit. Open Settings > Battery > App battery management, find WhatsApp and allow background activity plus disable battery optimization for it. Then go to Settings > Apps > WhatsApp > Notifications and make sure all categories are enabled, and in Settings > Battery turn off 'Sleep standby optimization'. Locking WhatsApp in the Recent apps tray also stops ColorOS from killing it overnight. See how others solved this on Reddit

This message usually means your WhatsApp version has expired or hit a temporary server-side maintenance window. First open the Play Store, search WhatsApp and tap Update to get the latest build. If no update appears, clear the app cache via Settings > Apps > WhatsApp > Storage usage > Clear cache (do not clear data, which deletes chats), then restart the phone. If it persists, wait a few hours, since WhatsApp occasionally runs scheduled maintenance that resolves on its own. See how others solved this on Reddit

Go to Settings > Apps > WhatsApp > Notifications and make sure the Calls category is enabled with lock-screen and banner/pop-up alerts turned on. Then open Settings > Battery > App battery management, select WhatsApp and allow background activity while disabling optimization, since ColorOS otherwise blocks the incoming-call screen. Finally check Settings > Apps > Special app access > Display over other apps (or App permissions) and grant WhatsApp that permission so the call interface can appear over the lock screen. See how others solved this on Reddit