LG has used a press conference to tell the world that it is now producing mobile panels featuring in-cell touch screen display technology, reports WSJ. Although the company did not indicate the size of the mobile displays it is producing, one of the oft repeated rumors about the upcoming next-generation iPhone is that it will feature a 4-inch display using in-cell technology. LG Display is already acknowledged as one of Apple's display manufacturing partners, with the timing of the announcement in line with reports that Apple plans to announce the eagerly anticipated device on September 12.