WhatsApp for Honor Magic 4 Pro

Honor's aggressive battery management is closing WhatsApp in the background, so messages only arrive when you manually open it. Go to Settings > Apps > Apps > WhatsApp > Battery and set it to 'No restrictions' (or Manual manage > enable Auto-launch, Secondary launch and Run in background), then in Settings > Battery turn off any power-saving mode. This stops MagicOS from suspending the app and restores real-time alerts. See how others solved this on Reddit

When notifications fade out over hours it's usually the system clearing WhatsApp from memory, so lock it in recents: open the multitask (recents) view, swipe down on the WhatsApp card and tap the lock icon. Also confirm notifications are allowed in Settings > Apps > Apps > WhatsApp > Notifications, and in Settings > Battery > Launch set WhatsApp to 'Manage manually' with Auto-launch, Secondary launch and Run in background all enabled. Keeping it locked and unrestricted prevents MagicOS from silently freezing it overnight. See how others solved this on Reddit

The full-screen call banner is blocked because WhatsApp is missing the display permission MagicOS needs for over-the-top call screens. Go to Settings > Apps > Apps > WhatsApp > Notifications, enable the 'Calls' channel and turn on 'Banners' plus lock-screen display, then open Settings > Apps > Apps > WhatsApp > Permissions and allow 'Display over other apps' and 'Display pop-up windows while running in the background'. After enabling these, incoming calls will ring with the full-screen accept/decline interface. See how others solved this on Reddit

This is almost always background restrictions cutting WhatsApp's connection, sometimes combined with a missing display permission for the call screen. Set Settings > Apps > Apps > WhatsApp > Battery to 'No restrictions', enable Auto-launch under Manual manage, and grant 'Display over other apps' in the app's permissions. Also make sure WhatsApp has Microphone and Camera permission, then reboot the phone so the call service re-registers in the background. See how others solved this on Reddit

WhatsApp uses its own in-app camera, which often stutters on Honor devices, so the quickest workaround is to tap the attach/paperclip icon and pick the Gallery or the system Camera instead of the built-in viewfinder. If the camera still fails to start, open Settings > Apps > Apps > WhatsApp > Permissions and confirm Camera is allowed, then clear the cache via Settings > Apps > Apps > WhatsApp > Storage > Clear cache and update WhatsApp from the Play Store or AppGallery. Keeping the app current resolves most of these MagicOS camera glitches. See how others solved this on Reddit

Because the Magic 4 Pro runs Android, the simplest route is a Google Drive backup: on your old phone open WhatsApp > Settings > Chats > Chat backup and back up to the Google account you'll use on the Honor, then install WhatsApp on the Magic 4 Pro and restore when prompted during setup. If you're coming from an iPhone, use WhatsApp's official 'Move to Android' feature with a cable, since iCloud backups aren't directly compatible with the Android app. See how others solved this on Reddit