Apple's charts compare its U.S. market share and global sales to Samsung's from 2004-2012
The second quarter of 2008 was when Sprint was pushing the 3G Samsung Instinct as an "iPhone Killer". This was when the OG Apple iPhone was running on EDGE. It was also just prior to the launch of the Apple iPhone 3G which would also account for the dip in Apple's market share at the time. That would also explain the drop in market share in the third quarter of 2011 as consumers awaited what would be the Apple iPhone 4S.
does not include the most recent quarter that showed the Korean manufacturer nearly doubling the number of iPhones sold by Apple in the period.
In today's opening statement at the District Court showdown between Apple and Samsung, the former once again pointed out Samsung's increasing market share, most likely to show how Apple has been harmed by Samsung's alleged patent infringement.