We heard recently that owners of Windows Phone 7.5 devices may have to wait until next year for Microsoft to release the Windows Phone 7.8 update for existing devices.
Now some more details on some of the features in Windows Phone 7.8 have been revealed,the details come from some Nokia training manuals which have been leaked.
Windows Phone 8 will apparently feature a customizable lock screen, with the option to pick an app to update on the lock screen, similar to Windows 8 Live app service.
Windows Phone 7.8 will also get an updated version of Internet Explorer, although it will not be the same IE 10 that is found in Windows Phone 8, instead it will be an updated version of IE 9.
Source Winp.cn, GSM Arena