From the following link on WPCentral: http://m.wpcentral.com/microsoft-full-details-gdr1-update-windows-phone-81 Support for 1280 x 800 WXGA resolution Diagonal screen sizes of 6.01" to 7" are now supported for the 1280 x 768 WXGA resolution 540 x 960 native qHD resolution is now supported in addition to the ability to scale from HD or WVGA resolution to qHD Diagonal screen sizes up to 6" and on phones that use the MSM8x12 applications processor now support 540 x 960 qHD resolution Dual SIM C + G radio type is now supported for dual SIM phones Bluetooth PAN (personal area network) 1.0 profile, aptX codec support for A2DP, and browsing support for AVRCP are now supported Support for a Store live tile when the tile is medium-sized The size of the Store tile has been standardized for all layouts and some tiles have changed places on the Start screen. Support for folders. Enable a phone cover app to launch when the phone cover is closed and specify the default setting for the lock screen's auto unlock setting. Cortana Add a phone book entry for Cortana to allow users to initiate speech from a car that doesn't have support for activating speech on the phone that is connected over Bluetooth. Network Time Protocol support Automatically set the time, using an NTP client, in a Windows Phone device that doesn't support NITZ or when cellular data is not available. Voice over LTE (VoLTE) support OEMs can implement a custom lock screen OEMs can preload the Files app Added a note that all Wi-Fi Sense settings must be on unless Microsoft executive approval has been granted for specific mobile operator requests. This is pretty cool, as part of the update: Aside from previously revealed folder support, the upgrade will allow for smart cases akin to HTC's Dot View or LG's QuickCircle. Phone makers will get to run special apps when the cover is closed, and specify what happens when it's open. This seemingly simple addition could be important, since The Verge claims that HTC is preparing a Windows Phone version of the new One -- such a device would need smart cover features to perform the same tricks as its Android counterpart.