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▶ About this video: This video shows you how to stop WhatsApp's "You may have new messages" notification in Android 8.0 (Oreo) and later. A written tutorial is also available in my blog here: [ Ссылка ]
On how to disable the related "Checking for new messages" notification please check this other video: [ Ссылка ]
SUMMARY
This notification usually appears when WhatsApp is unable to check for new messages whilst it's closed (i.e. running in the background). It's usually an escalation of the "Checking for new messages" notification indicating a very slow or bad internet connection.
It could however be also caused by user settings such as restricting background data as I've explained in the blog post.
The notification typically disappears on its own once the connectivity issue is resolved however it may persist for longer if conditions don't improve in which case you can clear the notification manually.
To avoid doing this all the time you can disable this particular notification using Android's new notification categories as shown in the video.
Doing this will turn off the notification without affecting other normal WhatsApp's notifications for chats or calls.
TROUBLESHOOTING
1. Android 7 and below
Categorized notifications are not available in older versions and you may be forced to turn off all WhatsApp notifications just to disable this one (on Android 7.0 (Nougat).
Some workarounds you may want to try before blocking all WhatsApp notifications include:
Ensure WhatsApp is not blocked from using Background Data (Android 7)
Disable Restricting Background Data (Android 6.0 and below)
Turn on off Data Saver temporarily or whitelist WhatsApp to have unrestricted data usage.
2. WhatsApp is using Battery Notification
After turning off this notification along with the "Checking for new messages" notification Android may start getting the notification "WhatsApp is using battery".
You can disable this new notification as well as explained here: [ Ссылка ]
Cheers!
