Universal Mobile Telecommunications System (UMTS) is one of the third-generation (3G) mobile telecommunications technologies, which is also being developed into a 4G technology , Standing for Universal Mobile Telecommunications System, UMTS combines three different air interfaces, GSM's Mobile Application Part (MAP) core, and the GSM family of speech codecs and UMTS represents an evolution in terms of services and data speeds from todayâ„¢s second generation mobile networks. As a key member of the global family of third generation (3G) mobile technologies identified by the ITU, UMTS is the natural evolutionary choice for operators of GSM networks, currently representing a customer base of more than 850 million end users in 195 countries and representing over 70% of todayâ„¢s digital wireless market. Using fresh radio spectrum to support increased numbers of customers in line with industry forecasts of demand for data services over the next decade and beyond, UMTS is synonymous with a choice of WCDMA radio access technology