TV shows and movies only make you think it’s a cultural thing.
We say “bye” here in the US after essentially every phone call otherwise people would probably be confused at when the conversation ended or when you’re hanging up.
An exception I’ve had to this is when I’m getting a phone call where someone is trying to meet me at a location. I might hang up without saying bye if we both make eye contact in person and find each other. Because we’re going to continue the conversation in person anyway.
There are other rare exceptions like this, but it’s definitely culturally expected for you to say “bye” before hanging up!
TV shows and movies only make you think it’s a cultural thing.
We say “bye” here in the US after essentially every phone call otherwise people would probably be confused at when the conversation ended or when you’re hanging up.
An exception I’ve had to this is when I’m getting a phone call where someone is trying to meet me at a location. I might hang up without saying bye if we both make eye contact in person and find each other. Because we’re going to continue the conversation in person anyway.
There are other rare exceptions like this, but it’s definitely culturally expected for you to say “bye” before hanging up!