Symbian has lost more than a sixth of its smartphone market share in just the past year, Gartner found today. The platform, used almost exclusively by Nokia, fell from 44.6 percent last summer to 36.6 percent a year later. RIM's BlackBerry platform, despite its record high sales, also plunged sharply as it fell from 20.7 percent a year ago to 14.8 percent this summer.
