WhatsApp for Poco X6 Pro

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

Delayed notifications almost always come from HyperOS battery optimization throttling WhatsApp in the background. Go to Settings > Apps > Manage apps > WhatsApp, set Battery saver to No restrictions, and enable Autostart. Then in Settings > Battery turn off any battery-saver or scheduled power-saving modes. You can also open the Recents screen, hold or swipe down on WhatsApp's card, and tap the lock icon so the system stops clearing it from memory. See how others solved this on Reddit

Do Not Disturb only silences apps that aren't marked as priority, so an exception is letting WhatsApp through. Open Settings > Sound & vibration > Do Not Disturb and check the Apps / Priority notifications (Exceptions) list, then remove WhatsApp so it is no longer allowed to break through. Also review WhatsApp's in-app Settings > Notifications and clear any custom call/message override. After that DND will mute WhatsApp calls and messages as expected. See how others solved this on Reddit

If the display stays on when you hold the phone to your ear, first make sure no case, screen protector, or dirt is covering the top of the screen near the earpiece where the sensor sits. You can test the sensor with the hardware test menu via the dialer code *#*#64663#*#* (CIT test) and run the proximity check. If it still misbehaves, clear WhatsApp's cache in Settings > Apps > Manage apps > WhatsApp > Clear data > Clear cache and reboot, since a stuck sensor reading is often a software glitch after a HyperOS update rather than a hardware fault. See how others solved this on Reddit

First confirm WhatsApp has microphone access in Settings > Apps > Manage apps > WhatsApp > Permissions > Microphone (set to Allow), and disable any audio enhancers like Dolby Atmos in Settings > Sound & vibration that can distort playback. If voice notes still fail or sound broken, clear WhatsApp's cache under Settings > Apps > Manage apps > WhatsApp > Clear data > Clear cache and update the app from the Play Store, as audio glitches are common after a HyperOS upgrade. See how others solved this on Reddit

HyperOS updates can reset app permissions and re-enable battery restrictions, so after updating re-apply them in Settings > Apps > Manage apps > WhatsApp: set Battery saver to No restrictions, enable Autostart, and re-confirm Notifications and Storage permissions. If chats fail to load or sync, clear the cache (not data) on that same WhatsApp app page and reboot, then update WhatsApp from the Play Store, which usually resolves display issues introduced by the new firmware. See how others solved this on Reddit