WhatsApp for Pixel 9a

In WhatsApp, tap the three-dot menu > Settings > Notifications and make sure Message notifications are enabled. Then open Android Settings > Apps > WhatsApp > Notifications, tap the "Messages" category and set its importance to "High" (this is what enables "Pop on screen"/heads-up banners). Finally check Settings > Notifications > Do Not Disturb isn't blocking it, and set Settings > Apps > WhatsApp > App battery usage to "Unrestricted" so the system doesn't throttle alerts in the background. See how others solved this on Reddit

Video call quality drops when bandwidth is tight, so first test on a strong Wi-Fi connection. Then open WhatsApp Settings > Storage and data and turn off "Use less data for calls" so it stops capping the bitrate. If it persists, clear the app cache via Android Settings > Apps > WhatsApp > Storage & cache > Clear cache, confirm Camera permission is set to "Allow" under Settings > Apps > WhatsApp > Permissions, and make sure WhatsApp is updated from the Play Store. See how others solved this on Reddit

Start by updating WhatsApp from the Play Store, since crashes are usually fixed in a newer build, then go to Settings > Apps > WhatsApp > Storage & cache > Clear cache (not Clear storage, which logs you out). If it still crashes, check for a pending system update under Settings > System > Software updates, and as a last resort uninstall and reinstall WhatsApp after backing up your chats to Google Drive via WhatsApp Settings > Chats > Chat backup. See how others solved this on Reddit

Confirm WhatsApp has microphone access under Settings > Apps > WhatsApp > Permissions > Microphone set to "Allow," and make sure no other app or a Bluetooth earbud is holding the audio channel. If recordings cut out or won't play, clear the cache under Settings > Apps > WhatsApp > Storage & cache > Clear cache and restart the phone, then update WhatsApp from the Play Store, as this was a known bug fixed in later versions. See how others solved this on Reddit

Free up space by going to WhatsApp Settings > Storage and data > Manage storage and deleting large forwarded media, then clear the app cache via Android Settings > Apps > WhatsApp > Storage & cache > Clear cache. Set WhatsApp to "Unrestricted" under Settings > Apps > WhatsApp > App battery usage so it isn't throttled in the background, and restart the phone after updating to the latest WhatsApp build from the Play Store. See how others solved this on Reddit

New Android versions occasionally break WhatsApp until both are in sync, so first update WhatsApp from the Play Store, then clear its cache under Settings > Apps > WhatsApp > Storage & cache > Clear cache and reboot. If a feature like video or notifications still misbehaves, check Settings > System > Software updates for a patch and set WhatsApp's battery usage to "Unrestricted" so newer power management doesn't interfere. See how others solved this on Reddit