I do get a little tired of the defult "the entire world works like the US" assumption sometimes. If you follow all of these "etiquette rules" in some places that aren't the US, you are likely to have a suboptimal time - https://www.washingtonpost.com/technology/2023/09/25/cell-phone-etiquette-call-voicemail/ 

 @640e31bb I saw the headline on that one earlier, mentally rolled my eyes and moved on. https://www.gawker.com/culture/i-should-be-able-to-mute-america