As the internet becomes more and more important and useable in our lives, chatting on internet, which is cheaper than talking on phone, becomes more and more popular.
Chatting on internet is very cheap, and the charge is the same wherever the person you are chatting with is. Although it is not as convenient as a mobilephone, but as the cities developed, you can always find a net-bar wherever you are, and you do not need to pay for the charge as the mobilephone number is not native.1