With the influx of a series of new S60 phones from Samsung, there are serious questions to be asked about software compatibility, both intentional and unintentional, from the viewpoint of Nokia, S60, Samsung and the many third party developers. Richard Bloor has taken four of Samsung's latest handsets and tested their compatibility with a typical 'power user' set of applications. The results make interesting reading, especially so for the companies involved. Many challenges ahead, methinks....