Mobile phones are the best and the fastest mode of communication systems. They are most popular device help in bringing the gap and distance closer. These are available in different companies, models, sizes, and colors and provide a wide variety of features and functions. They are available in different price ranges suiting every individual's pocket. Millions of people around the world use cellular phones today. Mobile phones or cellular phones are long-range, portable electronic devices for mobile communication. In addition to the standard voice function of a telephone, current mobile phones can support many additional services such as SMS for text messaging, email, packet switching for access to the Internet, and MMS for sending and receiving photos and video. Mobile phones are distinct from cordless telephone, which generally operate only within a limited range of a specific base station. Most current mobile phones connect to a cellular network of base stations, which is in turn interconnected to the public switched telephone network. These days, cellular phones or mobile phones provide an incredible array of functions. Depending on the cell-phone model, one can store contact information, make task or to-do lists, keep track of appointments and set reminders, Use the built-in calculator for simple math, send or receive e-mail, get information (news, entertainment, stock quotes) from the internet, play games, watch TV, send text messages, integrate other devices such as PDAs, MP3 players and GPS receivers. Other facilities include built-in cameras, ring tones, radio, Push-to-Talk, infrared and blue tooth connectivity etc.