Mobile phone features (2.0), dual line support, infrared, Bluetooth (2.0) and WiFi connectivity, NFC, instant messaging, Internet e-mail and browsing and serving as a wireless modem. The first smartphone was the Nokia 9000 Communicator in 1996 which added PDA functionality to the basic mobile phone at the time. As miniaturization and increased processing power of microchips has enabled ever more features to be added to phones, the concept of the smartphone has evolved, and what was a high-end smartphone five years ago, is a standard phone today. Several phone series have been introduced to address a given market segment, such as the RIM
Postpaid mobile phone use of mobile services and, as a consequence, unlimited credit. This service is better for people with a secured income. Postpaid service mobile phone typically requires two essential components in order to make the 'post-usage' model viable: The bill itself is an important component of the services which acts as an ambassador of the service provider and at times as an evidence of the service itself. The bill needs to be readable, comprehensible as well as aesthetically attractive for the subscriber to be interested enough to see details other than the bill amount. The United States is an example of