The revision should also enable more of the tablet-sized phones that are all the rage in some corners of the globe. It'll support a 1,280 x 768 resolution on screens as large as 7 inches, and there's a new 1,280 x 800 option useful for larger devices that use software navigation buttons. Other upgrades are smaller, but should be important in the long run -- the update should bring high-quality voice over LTE, higher-quality Bluetooth music (through aptX) and manufacturer-defined custom lock screens. There's no confirmed schedule for when GDR1 would arrive, but Microsoft is clearly getting close. It won't be surprising if the next big wave of Windows Phones ships with the new features built in.
source: engadget.com BY Jon Fingas