WhatsApp for Huawei Mate 40

The Mate 40 ships without Google Mobile Services, so the most reliable method is to download the APK directly from the official site, whatsapp.com/android, on the phone's browser. When the download finishes, tap the file in Files (Internal storage > Download) and allow installs from this source when prompted, then open WhatsApp and verify your number. Huawei AppGallery does not carry WhatsApp officially in most regions, and third-party APK mirrors often serve outdated builds that stop working, so stick to whatsapp.com. See how others solved this on Reddit

This is usually HarmonyOS closing the app in the background combined with push not working without GMS. Go to Settings > Battery > App launch, find WhatsApp, turn off Manage automatically, and in the pop-up enable Auto-launch, Secondary launch, and Run in background. Then lock WhatsApp in Recents by swiping up slightly on its card and tapping the lock icon. If messages still only arrive when you open the app, update WhatsApp by reinstalling the latest APK from whatsapp.com, since expired older versions stop syncing. See how others solved this on Reddit

WhatsApp itself runs fine on the Mate 40, but because the phone lacks Google's push service the most common complaint is delayed notifications. Fix it by going to Settings > Battery > App launch, switching WhatsApp from automatic to manual, and enabling Auto-launch, Secondary launch, and Run in background. Then check Settings > Notifications > WhatsApp is allowed. With those set, message and call alerts arrive in real time rather than only when you open the app. See how others solved this on Reddit

WhatsApp's cloud backup uses Google Drive, which the Mate 40 cannot reach, so you must restore from a local backup. Before installing WhatsApp, copy the WhatsApp folder from your old phone into the same path on the Mate 40 (newer Android versions use Android/media/com.whatsapp/WhatsApp, older ones use the WhatsApp folder in internal storage). Then install WhatsApp from whatsapp.com, verify the same number, and it will detect the local backup and offer to restore. The backup files live in the Databases subfolder as msgstore.db files, with the most recent date being newest. See how others solved this on Reddit

Because the Mate 40 backs up locally rather than to Google Drive, transferring to another Android phone needs the local database files. First open WhatsApp > Settings > Chats > Chat backup on the Mate 40 to force a fresh local backup, then copy the entire Android/media/com.whatsapp/WhatsApp folder to the same path on the new phone before installing WhatsApp there. For a phone that has Google services, you can alternatively sign in to Google Drive on the new device and back up there first. For iPhone, use WhatsApp's official Move to iOS transfer, since local Android files are not directly compatible. See how others solved this on Reddit

If you used Phone Clone or a backup tool to move data, the copied WhatsApp often lacks working push and stays silent until reopened. Uninstall the copied WhatsApp, reinstall it fresh from whatsapp.com, and re-verify your number. Then go to Settings > Battery > App launch, set WhatsApp to manual, and enable Auto-launch, Secondary launch, and Run in background. Finally confirm Settings > Notifications > WhatsApp is on so alerts reach the status bar. See how others solved this on Reddit