How to block sms without numerous on my Galaxy Note 9

[EVK]

Need Help to Block SMS with out phone number (add message with out phone numbers)

[Anuj1996]

Try to activate DND service from the service provider you are currently on.

I hope it solves your problem and don't forget to accept solution so as to help others too.

Thank you.

[EVK]

I have activated DND service long ago it is of no use same issue