WhatsApp for Honor X9b

Honor's MagicOS aggressively closes background apps to save battery, which holds WhatsApp messages until you open the app. Go to Settings > Apps > Apps > WhatsApp > Battery and set it to 'No restrictions' (or open 'Launch' / 'App launch' and switch it to Manual, then enable Auto-launch, Secondary launch and Run in background) so WhatsApp can stay connected. Also lock WhatsApp in the recent-apps screen by swiping down on its card so the system won't clear it from memory, and confirm notifications are enabled in Settings > Notifications. See how others solved this on Reddit

This usually happens when MagicOS blocks WhatsApp's background activity or its lock-screen/overlay permission. In Settings > Apps > Apps > WhatsApp > Notifications, enable notifications and turn on the call-notification category, then under Battery choose 'No restrictions'. Grant 'Display over other apps' via Settings > Apps > Special access (or Advanced settings), and inside WhatsApp open Settings > Notifications to confirm call notifications are on. Disabling battery optimization for WhatsApp is the step most users report fixes the missing lock-screen calls. See how others solved this on Reddit

iCloud WhatsApp backups aren't compatible with Android, so you need the official iOS-to-Android transfer, which runs during the Honor's initial setup using a USB-C cable. On a freshly reset (or new) phone, start setup and choose to copy data from an iPhone using Google's 'Switch to Android' / 'Move to Android' flow, connect both phones with the cable, scan the on-screen QR code, and select WhatsApp when prompted to verify the move. This only works during first-time setup, so if the phone is already set up you'll need to factory reset to run it; as a fallback you can export individual chats via WhatsApp > chat > More > Export chat, though full media history may not carry over. See how others solved this on Reddit

Random crashes are usually caused by MagicOS memory cleanup or a corrupted app cache. First clear the cache under Settings > Apps > Apps > WhatsApp > Storage > Clear cache (not Clear data, which deletes chats), then update WhatsApp from the Play Store or AppGallery to the latest version. If it persists, set WhatsApp's Battery option to 'No restrictions' so the system stops force-closing it, and restart the phone to clear any stuck process. See how others solved this on Reddit

Login and SMS-verification failures often come from a blocked background connection or an outdated app version. Make sure WhatsApp has full network access in Settings > Apps > Apps > WhatsApp > Data usage (enable both mobile data and background data), and update the app from the Play Store or AppGallery. If the verification code never arrives, wait for the SMS timer to run out and choose 'Call me' instead, and confirm your date and time are set to automatic under Settings > System & updates > Date & time. See how others solved this on Reddit

A frozen loading screen is typically a cache or connectivity issue rather than a damaged install. Force-stop WhatsApp via Settings > Apps > Apps > WhatsApp > Force stop, then clear its cache under Storage and reopen it on a stable Wi-Fi connection. If it still hangs, toggle Airplane mode on and off to reset the network, restart the phone, and confirm WhatsApp is updated to the newest version from the Play Store or AppGallery. See how others solved this on Reddit