Nokia 3310 - The Nokia 3310 is a dual band GSM900/1800 mobile phone. Released in the fourth quarter of 2000, it replaced the massively popular Nokia 3210. This phone sold extremely well, being one of the most successful phones with 126 million pieces sold.[1] Several variants of the 3310 have been released, including the Nokia 3315, 3320, 3330, 3350, 3360, 3390 and 3395. Design The 3310 is a compact, but somewhat heavy (133 g) phone featuring an 84 x 48 monochrome display. It is a slightly rounded rectangular unit that is typically held in the palm of a hand, with the buttons operated with the thumb. The blue button is the main button for selecting options, with 'C' button as a 'back' or 'undo' button. Up and down buttons are used for navigation purposes. The on/off/profile button is a stiff black button located on the top of the phone. - answers.com