Joke Collection Website - Public benefit messages - I9 100 SMS prompts you to have a new SMS. How to turn it off?

I9 100 SMS prompts you to have a new SMS. How to turn it off?

First, you can set the default notification ringtone in Settings-> Sound-> Notification ringtone.

Settings-> voice-> incoming call-> ringtone-> you can set the default voice ringtone.

Second, see if there is any incoming call software installed. Enter its settings to turn off the sound.