WhatsApp for Poco X6

HyperOS aggressively kills background apps, so first go to Settings > Apps > Manage apps > WhatsApp > Battery saver and set it to 'No restrictions', then turn on Autostart for WhatsApp on the same screen. Next open Settings > Notifications & Control Center > WhatsApp, make sure notifications are on, and set 'Lock screen notifications' to 'Show notifications and content'. Finally, lock WhatsApp in Recents (open Recents, hold the app card, tap the lock icon) so the system stops closing it in the background. See how others solved this on Reddit

By design, WhatsApp calls are treated like phone calls, and on HyperOS the default Do Not Disturb settings still let 'Repeat callers' through. Go to Settings > Sound & vibration > Do Not Disturb, open the people/exceptions section and turn off 'Repeat callers' (and set Calls/Messages to 'No one' if you want full silence). If a specific chat still alerts you, open that chat in WhatsApp > tap the contact/group name > Custom notifications and turn off the custom tone, since per-chat overrides can keep alerting even during DND. See how others solved this on Reddit

This usually happens when the media visibility flag or storage permission resets after a HyperOS update. Open WhatsApp > Settings > Chats and enable 'Media visibility', then go to Settings > Apps > Manage apps > WhatsApp > Permissions and grant access to Photos and media / Files. If they still don't appear, check that no '.nomedia' file is sitting in the WhatsApp Images folder, then restart the phone so the Gallery app re-scans the media. See how others solved this on Reddit

Go to Settings > Notifications & Control Center > WhatsApp > Messages and confirm the channel is set to 'Make sound and pop up' with a notification tone selected (not 'Silent'). Then inside WhatsApp open Settings > Notifications and pick a tone under Message notifications. If it's still silent, clear WhatsApp's cache via Settings > Apps > Manage apps > WhatsApp > Clear data > Clear cache (cache only, this keeps your chats), which rebuilds the broken notification channel HyperOS sometimes creates. See how others solved this on Reddit

When the screen blacks out during calls or audio plays from the earpiece instead of the speaker, it's usually the proximity sensor being mis-read rather than faulty hardware. Make sure no screen protector, dirt, or case is covering the sensor near the top of the screen. You can check the sensor in the hardware test menu via the dialer code *#*#6484#*#* (CIT test). If clearing WhatsApp's cache and rebooting doesn't restore normal playback and the sensor still reads wrong, it points to a hardware service issue. See how others solved this on Reddit

HyperOS 2.0 introduced rendering and background bugs that affect WhatsApp, so first update WhatsApp to the latest version from the Play Store, then clear its cache under Settings > Apps > Manage apps > WhatsApp > Clear data > Clear cache. If chat screens or the in-app keyboard still misbehave, disable 'Memory extension' in Settings > Additional settings, then re-grant WhatsApp 'No restrictions' battery and Autostart, since the update often re-restricts apps. See how others solved this on Reddit