WhatsApp for Huawei P20 Pro

WhatsApp periodically drops support for very old app versions and older Android releases, so an outdated build on the P20 Pro can suddenly stop launching or connecting. First update WhatsApp: if the Play Store is present and working, update there; otherwise download the latest APK directly from whatsapp.com/android and install over the existing app (this keeps your chats). Before any reinstall, open WhatsApp > Settings > Chats > Chat backup to save a local backup, then update or reinstall the current version. See how others solved this on Reddit

On EMUI 13 and HarmonyOS, devices without Google Play Services can hit verification or connection errors with WhatsApp. Uninstall the current copy and sideload the latest build straight from whatsapp.com/android, which handles core messaging without Play Services. Then open Settings > Apps > WhatsApp, allow unrestricted background activity, and turn off battery optimization for WhatsApp so it stays connected and receives notifications. See how others solved this on Reddit

Clear local recordings but muffled call audio points to software noise-suppression or permissions rather than a broken mic. Open Settings > Apps > WhatsApp > Permissions and confirm the Microphone is allowed, then restart the phone to reset audio routing. If it persists, clear WhatsApp's cache via Settings > Apps > WhatsApp > Storage and test a call. Dust in the bottom mic port can also muffle audio, so gently clean it. See how others solved this on Reddit

A missing waveform on voice notes is usually a WhatsApp rendering glitch after an update or a corrupted cache. Go to Settings > Apps > WhatsApp > Storage and clear the cache (not data), then force stop and reopen the app. If it continues, reinstall the latest version from whatsapp.com/android, since outdated sideloaded builds can drop UI elements like the waveform. See how others solved this on Reddit

WhatsApp's official Android-to-iPhone transfer relies on Apple's Move to iOS app and Google Play Services, which can be unreliable or missing on the P20 Pro. The dependable workaround is a paid third-party tool such as Wutsapper or iCareFone Transfer over USB, which copies the WhatsApp database directly to the iPhone. Before starting, open WhatsApp > Settings > Chats > Chat backup so a fresh local backup exists on the phone. See how others solved this on Reddit

If Google Drive backup is unavailable, use WhatsApp's local backup instead. Open WhatsApp > Settings > Chats > Chat backup to write a local backup to internal storage, then copy the WhatsApp folder (Internal storage > Android/media/com.whatsapp/WhatsApp) to a PC or card. To restore on another phone, place that folder in the same path before installing WhatsApp and it will detect the local backup. See how others solved this on Reddit