WhatsApp for Poco

On HyperOS the WhatsApp media folder sometimes isn't indexed by the Gallery. First, in WhatsApp go to Settings > Chats and turn on 'Media visibility'. Then open Settings > Apps > Manage apps > WhatsApp > Permissions and confirm Storage/Files access is granted. If photos still don't appear, the Gallery index is stale, so go to Settings > Apps > Manage apps > Gallery > Clear cache and let it rescan (avoid 'Clear data', which resets album settings). See how others solved this on Reddit

HyperOS aggressively kills background apps, so first open Settings > Apps > Manage apps > WhatsApp > Autostart and turn it on, then open Battery saver for WhatsApp and set it to No restrictions. Next check Settings > Notifications & Control center > Lock screen notifications and make sure WhatsApp is allowed to show content on the lock screen, and inside WhatsApp confirm Settings > Notifications > Show notifications is enabled. As an extra step, lock WhatsApp in the Recents screen (pull the app card down to show the lock icon) so the system stops closing it. See how others solved this on Reddit

On HyperOS this is almost always battery optimization killing WhatsApp in the background. Go to Settings > Apps > Manage apps > WhatsApp > Battery saver and set it to "No restrictions", then go to Settings > Apps > Manage apps > WhatsApp and enable "Autostart". Finally, open WhatsApp in the Recents screen, swipe down on its card (or long-press it) and tap the lock icon so HyperOS doesn't clear it from memory. See how others solved this on Reddit

This is almost always the proximity sensor reacting as if the phone is held to your ear, which pauses playback or routes audio to the earpiece instead of the loudspeaker. Make sure nothing is covering the small sensor area near the top of the screen, including a thick screen protector or your fingers. Test the sensor by dialing *#*#64663#*#* to open the hardware test menu and checking the proximity/P-sensor reading. If the reading is stuck, clean the top bezel and remove any tinted protector film; if it still misbehaves the sensor may be faulty and needs service. As a stopgap, play voice messages over the speaker by keeping the screen face-up and away from your face. See how others solved this on Reddit

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

HyperOS can block WhatsApp from writing to shared storage until you grant access. Open Settings > Apps > Manage apps > WhatsApp > Permissions and set Photos and videos (Files and media) to Allow. Then inside WhatsApp open Settings > Chats and turn on Media visibility so saved images are exposed to the Gallery, and check Settings > Storage and data > Media auto-download so incoming images actually download. After that, reboot once so the Gallery re-scans the WhatsApp Images folder. See how others solved this on Reddit

HyperOS aggressively manages background apps, so first open Settings > Apps > Manage apps > WhatsApp, set Battery saver to No restrictions, and turn on Autostart. Then go to Settings > Notifications & Control center > App notifications > WhatsApp and enable Lock screen notifications plus Show notification content. Finally confirm notifications are enabled inside WhatsApp's own Settings > Notifications. This keeps the connection alive while the phone is idle so alerts reach the lock screen. See how others solved this on Reddit

After a MIUI 14 update on the C55, first update WhatsApp from the Play Store, then clear its cache: go to Settings > Apps > Manage apps > WhatsApp > Clear data, and tap Clear cache (this won't delete your chats). Reboot the phone. If it still crashes, set Settings > Apps > Manage apps > WhatsApp > Battery saver to No restrictions so MIUI doesn't kill it in the background. See how others solved this on Reddit

HyperOS restricts which app notifications reach the lock screen by default. Go to Settings > Notifications & Control Center > App notifications > WhatsApp and turn on 'Show on lock screen' and 'Floating notifications'. Then open Settings > Apps > Manage apps > WhatsApp > Battery saver and set it to 'No restrictions' so the WhatsApp background service stays alive and messages reach the lock screen instantly. See how others solved this on Reddit

HyperOS aggressively kills background apps, which is the usual cause. Go to Settings > Apps > Manage apps > WhatsApp > Battery saver and set it to No restrictions, then enable Autostart so WhatsApp can keep running and start after a reboot. Finally, open Settings > Notifications & Control Center > App notifications > WhatsApp and confirm all notification categories are switched on. See how others solved this on Reddit