Microsoft (NASDAQ:MSFT) said it will start rolling out a software update to existing Windows Phone 8 phones "later this summer" that will include a handful of new features. One of the biggest ones will make Microsoft's Data Sense feature available to more carriers. Unveiled in October, Data Sense compresses users' data transmissions in order to reduce users' data consumption. Microsoft has said the technology can give users 45 percent more Web browsing than they would get if they were on the same data plan on another smartphone platform. Data Sense also shows users how much data each app is using, and it can notify a user when they begin approaching their monthly data allotment. Verizon Wireless (NYSE:VZ) is the only U.S. carrier that so far supports the feature, but AT&T Mobility (NYSE:T) said in January it was continuing to explore whether to support the feature. Other features of the update include bringing back support for FM radio and ensuring that Windows Phone continues to work with Google (NASDAQ:GOOG) services by adding support for Google's newest sync protocols--CalDAV and CardDAV. Post