Hello, my dears! I'm Débora from Brasil. How to instal a sound of alarm when arrives messages?

[Débora79]

Hello, my dears! I'm Débora Tognozzi Lopes  from Sao Jose dos Campos,  Sao Paulo, Brasil. Anyone here knows how to instal a sound of alarm when arrives message? I'm loosing lots of guests  because of this!😔

[Linda108]

In your profile if you have selected to be notified by email and/or text, notification sound is in your phone.