In the world of mobile platforms, Tizen's but a new entry that's been through some tough times since its inception. The circle of 36 companies (aptly called the Tizen Association) backing up the open source OS is putting up a good fight, though -- it even just welcomed 15 new members to its number. These include some big names you might recognize, such as Chinese search engine Baidu, Japanese carrier Softbank, hardware manufacturer ZTE and weather app AccuWeather. The most intriguing addition to the list, however, is Sprint, which first joined the association in 2012 before leaving it in 2013... only to join up yet again. We'll find out later if these companies are in any way connected to the Tizen devices to be previewed at Mobile World Congress -- and if they help the OS finally become a legit Android competitor.