The main advantage: less strain on the eyes during use. It means that you can chat with your fb friends as well as your phone contacts. It has a lot of new bug fixes along with added features. (calls are free via manuale blackberry curve 8500 series. otherwise, standard data rates apply. These days, every messaging app offers pretty much same functionality and features, it just depend upon the user-base and user preferences which app they want to use.Having bought a subscription, you can download this or other directories on our website. To download the file, click on the button below.