The bazaar model. In contrast, open platforms grant developers access to all or parts of the source code of their SDKs and their OS. Among the three opensource platforms, Linux seems to offer the most freedom, followed by Google who, for example, denies access to Bluetooth and Instant Messaging APIs for security reasons in their current SDK release. Nokia is in a transition phase making its Symbian OS open source. It is still not clear how open it will become. Benefits