K-pop band Cortis tells fans: put down the phone

Cortis is a K-pop band.

The band has a special request for its fans.

It wants fans to put down their phones during concerts.

Many people like to film shows with their phones.

Some fans even rent fancy phones just to record concerts.

Cortis thinks filming too much means you are not really watching the show.

The band named its whole concert tour 'Put Your Phone Down.'

Fans say they want to watch the videos again later.

They also like to share them on social media.

So there is a big debate about the best way to enjoy a concert.