Advocacy groups plan to file a complaint against AT&T, alleging violating the U.S. FCC's net neutrality rules.
About 5.4 million Windows Phone devices were sold in the quarter, for a 3.5 percent market share, up from 2.3 percent a year previously.
Consumers upgrade to new smartphones when contracts expire rather than pay high out-of-contract costs.
The OS update will be free and available for the iPhone 3GS, iPhone 4, and iPhone 4S, along with the second- and third-generation iPads.
Ahead of expected iPhone news interest in the phone reaches a fevered pitch.
T-Mobile doesn't appear to be on Apple's short list for iPhone 5 carriers, but that's not stopping T-Mobile from trying to lure iPhone customers to what it says will soon be its widespread 4G network.
If Apple uses a new, thinner display in its next iPhone, the battery could pack as much as 40% more capacity than the current 4S, a researcher says.
Most of the new phones support 4G/LTE cellular connectivity, providing a much bigger, always available, wireless data pipe at least for those subscribers who want it.