Land line has been used before for personal and official conversations. But nowadays landlines and its uses had been reduced. The reason for hat is emergence of mobile phones. As we know we were having payphones were we need to put a coin for dial others. But now we having a mobile phone where don't need to insert a coin.
Also landlines were difficult to carry out it has a cable attaches with it. but mobile phones were easy to carry and we'll access it from every where.
There is surprise news that half of American homes don't have or use their landline.