How do you prefer to keep in touch with friends? Do you call, chat online, exchange text messages, or write letters? I usualy use the chat online app. we have famus app in korea. It is called KaKao Talk most koreans useing it also voice calling is free. You can use it in another country. I think The wire telephons are getting more disappear. In my case I think I done't use almost about over 15 years. I done have this now.