How to Fix Galaxy S25 WhatsApp Notifications Not Working After Update

Galaxy S25 WhatsApp notifications not working after update usually means the latest One UI build changed notification permissions, background battery rules, network behavior, or WhatsApp itself is stuck using stale app data.

This guide focuses on exact fixes for Galaxy S25 WhatsApp notifications not working after update, including alerts that arrive late, silent notifications, missing call alerts, or no lock screen banners at all.

For broader help, also visit the Galaxy S25 hub, How to Fix Galaxy S25 Notifications Not Working After Update, How to Fix Galaxy S25 Gmail Notifications Not Working After Update, and How to Fix Galaxy S25 WhatsApp Calls Not Working After Update.

Fix #1: Check WhatsApp notification permissions again

After a major update, Android can quietly change app alert categories or disable a specific notification channel.

Open Settings > Apps > WhatsApp > Notifications.
Turn on Allow notifications.
Open each category and confirm message, group, and call notifications are enabled.

Fix #2: Remove WhatsApp from sleeping apps and battery restrictions

Samsung battery controls often delay or block WhatsApp alerts in the background.

Go to Settings > Apps > WhatsApp > Battery.
Select Unrestricted or at least Optimized.
Then open Settings > Battery and device care > Battery > Background usage limits and remove WhatsApp from sleeping or deep sleeping lists.

Fix #3: Confirm background data is enabled for WhatsApp

If background data is limited, WhatsApp may only sync when you open the app manually.

Open Settings > Apps > WhatsApp > Mobile data.
Enable Allow background data usage.
If data saver is on, allow unrestricted data for WhatsApp as well.

Fix #4: Restart the phone and your network connection

A reboot can clear a stuck push-notification service after a firmware update.

Restart the Galaxy S25.
Reconnect to Wi-Fi or mobile data.
Ask someone to send a test WhatsApp message and call.

Fix #5: Clear WhatsApp cache

Corrupted temporary files can break message syncing and notification delivery.

Go to Settings > Apps > WhatsApp > Storage.
Tap Clear cache.
Open WhatsApp again and test alerts.

Fix #6: Update WhatsApp and Google Play services

App-specific notification bugs often get fixed in quick follow-up updates.

Open the Play Store and update WhatsApp.
Also update Google Play services and other pending system components if available.
Restart the phone after updating.

Fix #7: Reset notification and network settings if the issue continues

If alerts are still missing, a settings reset can remove broken post-update preferences.

Back up anything important first.
Go to Settings > General management > Reset.
Start with Reset network settings, then test again before considering other resets.