WhatsApp for Honor Magic 6 Lite

This usually means WhatsApp lost its camera permission or the camera is still held open by another app. Go to Settings > Apps > WhatsApp > Permissions and set Camera to Allow, then force-close any open camera or video apps and reboot the phone. If the in-app camera still freezes, clear WhatsApp's cache via Settings > Apps > WhatsApp > Storage > Clear cache, which normally gets it working again. See how others solved this on Reddit

MagicOS aggressively closes background apps to save battery, which stops incoming call alerts from showing. Go to Settings > Apps > WhatsApp > Battery and set it to 'No restrictions' (turn off 'Manage automatically' if shown), then under Settings > Notifications > WhatsApp enable Calls and turn on lock-screen display and banners. Locking WhatsApp in the recent-apps switcher (swipe up to recents, tap the lock icon on the card) also helps keep it alive in the background. See how others solved this on Reddit

WhatsApp video quality is limited mainly by your connection and by data/battery savers, not just the camera. Turn off any data saver in Settings > Mobile network > Data usage, and inside WhatsApp turn off 'Use less data for calls' under Settings > Storage and data. Also set WhatsApp to 'No restrictions' under Settings > Apps > WhatsApp > Battery so MagicOS doesn't throttle it mid-call, and prefer Wi-Fi or a strong signal for the sharpest video. See how others solved this on Reddit

WhatsApp's official iOS-to-Android transfer must be done during the first-time setup of the app on the Honor. Install WhatsApp from AppGallery or the Play Store, and when it offers to 'Move chats from iPhone' follow the on-screen QR-code steps with both phones connected by a USB-C to Lightning cable. An iPhone iCloud backup can't be restored on Android directly, so do this cable-based move before you finish registering your number on the new phone. See how others solved this on Reddit

Android Auto needs notification access and an unrestricted background for WhatsApp to read out and send messages. In the Android Auto settings, enable WhatsApp under Notifications/messaging, then on the phone go to Settings > Apps > WhatsApp > Battery and set 'No restrictions'. Make sure Android Auto itself is also exempt from battery optimization, otherwise MagicOS can drop the connection and silence WhatsApp alerts while driving. See how others solved this on Reddit

Repeated crashes are usually fixed by clearing the cache and updating: go to Settings > Apps > WhatsApp > Storage > Clear cache (not Clear data, which deletes chats), then update WhatsApp from AppGallery or the Play Store. If it continues, set the app to 'No restrictions' under Settings > Apps > WhatsApp > Battery and reboot, since MagicOS memory management can force-close apps it thinks are idle. See how others solved this on Reddit