WhatsApp for Poco F7 Pro

Open WhatsApp, go to Settings > Chats and turn on 'Media visibility' so new downloads appear in the gallery, then open an individual chat's info screen and enable media visibility there too. Next, make sure WhatsApp has storage access under Settings > Apps > Manage apps > WhatsApp > Permissions > Files and media (set to 'Allow management of all files'). If older images still don't appear, restart the phone so HyperOS rescans the media database, and check that a '.nomedia' file hasn't been placed in the WhatsApp Images folder by a file manager. See how others solved this on Reddit

Go to Settings > Apps > Manage apps > WhatsApp > Battery saver and set it to 'No restrictions', and on the same App info page enable 'Autostart' so WhatsApp can run in the background under HyperOS. Then confirm notifications are allowed in Settings > Notifications & Control Center > App notifications > WhatsApp. Finally, in WhatsApp's own Settings > Notifications make sure message notifications and high-priority notifications are enabled. See how others solved this on Reddit

Go to Settings > Notifications & Control Center > App notifications > WhatsApp and enable lock screen notifications, choosing to show content rather than hide it. Then lock WhatsApp into recents (open the recents view, long-press its card, tap the lock icon) so HyperOS doesn't kill it in the background. Setting WhatsApp's Battery saver to 'No restrictions' and enabling Autostart also prevents notifications from being delayed until the screen is unlocked. See how others solved this on Reddit

First update WhatsApp from the Play Store, since audio routing bugs are often fixed in newer builds. Clear WhatsApp's cache via Settings > Apps > Manage apps > WhatsApp > Clear data > Clear cache, then check that the proximity sensor near the top of the screen isn't blocked by a screen protector, which can cause earpiece/speaker switching to misbehave. If voice notes record too quietly, confirm the Microphone permission is granted under WhatsApp > Permissions and disconnect any Bluetooth device that may be capturing the audio. See how others solved this on Reddit

Start by updating WhatsApp in the Play Store and clearing its cache under Settings > Apps > Manage apps > WhatsApp > Clear data > Clear cache (avoid 'Clear all data' unless your chats are backed up to Google Drive). If it still crashes on launch, uninstall and reinstall WhatsApp, then restore from your Google Drive backup during setup. Persistent crashes are often tied to a corrupt database or low free storage, so free up a few GB and reboot before reinstalling. See how others solved this on Reddit

WhatsApp's in-app filters only appear when you open the camera from inside WhatsApp, so grant the Camera permission under Settings > Apps > Manage apps > WhatsApp > Permissions > Camera. Make sure WhatsApp is fully updated in the Play Store, since filter and effects features roll out gradually by app version. If filters still don't appear, clear WhatsApp's cache and restart the app; the HyperOS system camera's own filters won't carry into WhatsApp. See how others solved this on Reddit