Microsoft is currently working the latest Windows Phone 8 update known as the General Distribution Release 3 (GDR3) that will bring support for high-resolution displays and quad-core processors. The update is also expected to bring a number of improvements to older devices as well.
Recently, a user from Windows Phone Central forum has posted a number of screenshots of the latest Windows Phone 8 GDR3 update running on Lumia 920 that he picked up on Craiglist from a anonymous developer. The update is being tested by Microsoft and is expected to launch with Nokia Lumia 1520 and HTC Harmony, as reported by The Verge.
The update includes a number of improvements such as orientation lock, which when turned on will change the orientation if the device is rotated. Another interesting feature a Driving Mode that allows you to automatically mute calls and texts while driving. Windows Phone 8 GDR3 update also includes ability to close apps in multitasking view, Custom sounds for text, voice mail, e-mail, and reminders. The most useful feature is the ability to restore your phone over WiFi after your reset Windows Phone 8 device. The user has posted a number of screenshots of many features which are available at the source link.
Nokia is expected to schedule an event by the end of September where the Finnish maker will unveil its first, Windows Phone 8 phablet. It is expected that Windows Phone 8 GDR3 update will hit high-end device during the same time period. Nokia is currently rolling out the much-awaited Amber update to its Lumia device which is expected to reach all devices by the end of September.