The messaging system not only allows you to send text messages from one user to another, but also to easily sending images, video, and even audio files. You can even create contact groups so you can open a chat room with them.
In order to make a phone call, the other users will have to have the app installed on their device. Once they do, Line will notify you that your friends are now using the app, and you can call them free of charge.
Line is a very exciting alternative for communicating with friends. However, one of the major issues it faces is the competition with other similar programs, as despite offering great features, it doesn't offer anything unique or new to attract new users.