WhatsApp for Vivo V30

Funtouch OS aggressively kills background apps to save battery, which delays or blocks WhatsApp pushes. Go to Settings > Battery > High background power consumption and allow WhatsApp, then open Settings > Apps > Manage apps > WhatsApp > Battery usage and choose Allow background activity / No restrictions. Also lock WhatsApp in the Recents screen by pulling its card down to add the padlock so the system stops clearing it from memory. See how others solved this on Reddit

Android 15 reset several background permissions, so re-grant them after updating. Go to Settings > Apps > Manage apps > WhatsApp and turn on Autostart, then set Battery usage to Unrestricted; also check Settings > Notifications & status bar > WhatsApp to confirm all notification categories and the lock-screen banner are enabled. If pushes are still slow, clear WhatsApp's cache via Manage apps > WhatsApp > Storage > Clear cache and reboot once. See how others solved this on Reddit

This usually happens when WhatsApp loses access to your phone's contacts after a sync glitch or update. Go to Settings > Apps > Permissions (Permission manager) > Contacts and make sure WhatsApp is set to Allow. Then open Settings > Accounts and force a Google contacts sync so the names re-populate. Finally, close and reopen WhatsApp (or restart the phone); WhatsApp pulls names directly from your phone's contacts, so once the permission and sync are restored the names appear. See how others solved this on Reddit

The App Clone feature on Funtouch OS often loses notification and background rights for the second app. Go to Settings > App Clone (or Dual Apps) and confirm the cloned WhatsApp is on, then open Settings > Apps > Manage apps, find the cloned WhatsApp instance, and grant Autostart plus Unrestricted battery usage. Verify its notification toggle under Settings > Notifications & status bar so the clone is allowed to alert separately from the primary app. See how others solved this on Reddit

iPhone-to-Android WhatsApp transfer must be done during setup with a USB-C cable, since iCloud backups can't be read by Android. Set up the V30 fresh (or factory reset it), install WhatsApp, and when it offers Move chats from iPhone, connect the two phones with a cable and follow the on-screen code/QR prompts. After the transfer, set up a Google Drive backup under WhatsApp > Settings > Chats > Chat backup for future restores. See how others solved this on Reddit

Funtouch OS counts cached memory as used, so a high RAM figure is normal and not the real problem. App reloads come from aggressive memory cleanup, sometimes made worse by the Extended/Virtual RAM feature. Try turning off Extended RAM under Settings > RAM (Memory) if reloads are frequent, lock WhatsApp in the Recents screen so it isn't purged, and keep it on Allow background activity under Settings > Apps > Manage apps > WhatsApp > Battery usage. See how others solved this on Reddit