In recent years with the massive rise in popularity of mobile and fixed electronic computing devices (PCs, PDAs, Laptops, Mobile phones, etc.), there has been a growing demand for high-speed digital wireless communication facilities. Bluetooth is a promising new technology that is aimed at supporting wireless connectivity among cell phones, headsets, PDAs, digital cameras and laptop computers. Initially, Bluetooth was proposed as a replacement to cables, but it evolved as a solution for forming Personal Area Networks. After comparing IEEE 802.11 it is observed that Bluetooth is more secure due to its short range. A model of Mobile Sony Ericsson z600 was studied in which connectivity behavior of Bluetooth environment has been analyzed. ukryj opis