The Wall Street Journal reports that Apple will begin production on the next iPhone this quarter, setting the stage for a potential launch this summer.Apple Inc. plans to begin production of a new iPhone similar in size and shape to its current one in the second quarter of the year, according to people familiar with the device's production, teeing up a possible summer launch for the next version of its flagship device. At the same time, Apple continues to work with its manufacturing partners in Asia on a less expensive iPhone that could be launched as soon as the second half of this year, these people said.In line with some