mainstream definition: a prevailing current or direction of activity or influence. the normal, standard, well known. Symbian = 45% Android = 19% Android w/Sense = >19% Android w/Timescape and Mediascape = >19% iOS = 14% By this definition, Symbian is mainstream. But you may subscribe to Apple's definition, since they're the biggest company in mobile now. LOL! Ignore the buzz and start using facts to make your point next time.