Microsoft’s decision to launch its Windows Phone 7 on AT&T’s GSM handsets while delaying the debut of the operating system on Verizon Wireless will serve to harden the battle lines between the two largest U.S. mobile phone carriers.
AT&T is lining up behind Apple’s iPhone and, now, Microsoft’s Windows Phone 7 against Verizon Wireless, which is relying primarily on its Google Android devices and    .. more …