In spite of seeming pressure, the iPhone 4 is still the top-selling smartphone at AT&T and Verizon by a wide margin, Canaccord Genuity said in a new research note. Checks showed that the Apple phone was still "by far" the most popular in May and June, even after phones like the Samsung Infuse 4G and Sony Ericsson Xperia Play arrived on shelves. While sales of Motorola's Droid X2 were "steady," Motorla's Atrix 4G at AT&T and Xoom tablet at Verizon were both "disappointing," research lead T. Michael Walkley and other analysts said.