Problem: sequence of three beeps.

[Atlante1]

Problem: sequence of three beeps.
Model Xperia Xa2 Plus in which three beeps sound every six seconds, as if it were a system warning Does anyone know what it may be?

Problema: secuencia de tres pitidos.

Modelo Xperia Xa2 Plus en el que suenan tres pitidos cada seis segundos, como si fuera un aviso del sistema ¿Alguien sabe a qué puede deberse? 

[Uliwooly]

@Atlante 

I've edited your post as this is an English only forum, you can use Google Translate to reply and/or post.

That seems to be a notification or alarm, does it happen all the time or at specific time? has it happened more than once?

[MickeyPlus]

This is a roaming warning