WhatsApp for Vivo V29

Vivo's OriginOS aggressively kills background apps to save battery, which delays WhatsApp message alerts. Go to Settings > Battery > High background power consumption and set WhatsApp to Allow; then open Settings > Apps > Manage apps > WhatsApp > Power consumption (or Battery usage) and enable Allow auto-launch and allow background activity. Finally, open the recent apps (multitasking) view and lock the WhatsApp card (drag it down or tap the lock icon) so the system won't clear it. See how others solved this on Reddit

Beyond battery restrictions, confirm the app's own notifications are enabled under Settings > Notifications & status bar > Manage notifications > WhatsApp (or Messenger), and turn on Allow notifications plus Lock screen notifications. Also make sure background data isn't restricted via Settings > Apps > Manage apps > WhatsApp > Data usage > allow background data. If you use a third-party cleaner or the built-in junk/phone manager, add messaging apps to its whitelist so they aren't force-stopped. See how others solved this on Reddit

Many OriginOS preinstalled apps can't be disabled from the normal menu, so the reliable no-root method is ADB from a computer: enable USB debugging in Developer options, connect the phone, and run 'adb shell pm uninstall -k --user 0 ' to remove a package for the current user without root. This frees up background resources while leaving WhatsApp untouched. Avoid removing core system or Google Play services packages, or notifications and other apps may break; you can restore a package later with 'cmd package install-existing'. See how others solved this on Reddit

WhatsApp keeps its own synced copy of your contacts, so a deleted contact can linger until it re-syncs. First confirm the contact is actually removed from the right account (check Settings > Accounts to see if it's a Google contact synced back to the phone). Then open WhatsApp, go to a new chat and pull down to refresh the contact list. If it persists, clear WhatsApp's cache via Settings > Apps > Manage apps > WhatsApp > Storage > Clear cache (not Clear data) and reopen the app. See how others solved this on Reddit

This is standard Android behavior: a phone call takes exclusive audio focus, so media and voice-note playback pause and then resume after the call ends. There's no toggle to play media over an active cellular call. For non-call situations where you want sound from more than one app at once, look under Settings > Sound & vibration for any multiple/independent audio source option, but during a real call the pause is expected and can't be disabled. See how others solved this on Reddit

WhatsApp compresses videos heavily when sent through the normal gallery picker. To preserve quality, attach the clip as a Document instead: in a chat tap the attach (paperclip) icon > Document > Browse and select the video file, which sends it uncompressed. Also set Settings > Storage and data > Media upload quality to HD, and keep clips within WhatsApp's size limit (about 2 GB) so they aren't re-compressed or rejected. See how others solved this on Reddit