The popularity of Android on Verizon hasn't been enough to stop AT&T from walking away with the US smartphone market with the iPhone, Asymco's Horace Dediu said Monday. Basing his information on potential insider info from ITG Investment Research's Matthew Goodman compared with AT&T's recent results, the analyst noted that Google's platform wasn't stopping Verizon's smartphone sales from declining and was mostly preventing an even steeper drop. They were mostly feeding on other platforms at the carrier rather than attracting new customers, Dediu said.