The use of PDA's has seen a huge increase in corporate businesses over the last few years. The latest developments are the integration of mobile phones and PDA's. This presentation will discuss the use such devices are seeing and the risks associated with it. Both hypothetical as real scenarios will be shown. As example the XDA (also known as T-mobile PDA, Qtek or Siemens SX 45 ) will be used. Internal aspects of the ARM based PocketPC Phone Edition are shown as well as how the phone part is connected to it. Examples from simple applications such as unlocking the phone to more complicated attacks will be demonstrated. Job de Haas got involved in the area of Internet and security in 1991, during his studies in Electrical Engineering, when he responded to internet providers offers to hack their sites and win a free account. Following post-graduate studies in Control Engineering and three years of work in aerospace robotics at the Netherlands National Aerospace Laboratory, he worked for DigiCash, where he acquired experience in cryptographic techniques used in secure, anonymous payment systems for the Internet. Now, after leading ITSX for five years, Job moved to the position of Technical Director where he leads and supervises the penetration testing teams.