iPhone 4 owners are noticeably happier with their devices than owners of recent Android and BlackBerry phones, ChangeWave found in a new study. Of those asked in November, 84 percent of iPhone 4 32GB owners and 78 percent of 16GB owners were "very satisfied." The approval was only higher than for the 3GS but was eight points higher than the next-best ranking for a rival, HTC's Evo 4G, which scored 76 percent.
