With an iPhone event scheduled for Tuesday at Apple‘s Cupertino, California campus looming, spy shots that appear to be snapped inside a Brazilian factory and an update to Apple’s iTunes software seemed to confirm an Apple update to the slablike iPhone 4. Less certain: a thin, wide-bodied handset with a teardrop shape. Case designs for a teardrop-shaped handset have already begun appearing on blogs, and, briefly, on the web-site of handset case supplier Casemate.