The iPhone is no longer Verizon's bestselling smartphone, according to a note from William Blair analyst Anil Doradla. The claim is based on channel checks for the June quarter, and marks the first time the iPhone has slipped out of the lead since the carrier started carrying the product in February last year. Although sales could potentially be suffering in the wait for a next-generation iPhone, Doradla suggests that the root cause is Verizon putting the brunt of its marketing into 4G-capable smartphones, namely the Motorola Droid RAZR MAXX.