Black and white iPhones could be joined by models in more colors in spring or summer with the same color options as the iPod Touch, a U.S. analyst says. Brian White of Topeka Capital Markets said he\'s been told by sources the next version of the iPhone will be introduced in May or June with \"more color patterns and screen sizes,\" CNET reported Wednesday. \"These colors included pink, yellow, blue, white and silver, black and slate ... We believe the addition of color to the iPod Touch lineup was a testing ground for adding color to the next generation iPhone that we believe could be available in eight colors in total,\" White said. Apple has used the iPod Touch as a way of testing consumer reaction to a possible improvement to the iPhone lineup before, CNET said. Offering different screen sizes could be Apple\'s way of offering both a lower-priced iPhone with a smaller screen as well as going after consumers who\'ve shown interest in so-called \"phablets,\" smartphones with screen sizes approaching tablet territory, White said.