Several hoax has revealed the latest and updated features of nokia lumia 510 windows phone 7.8 that includes non0DRM multimedia files sharing through Bluetooth connection, editing in ringtones, transfer of contacts, sharing of apps with latest update, new boot screen, latest start screen, new designs of apps, 20 accent colors, live lock screen wallpaper and nokia network+ settings. However, there is no confirmed date for its official launching.
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http://www.mobilefun.pk/mobile-phone-news/windows-phone-7-8-features-leaked-with-the-confirmation_49.html (http://www.mobilefun.pk/mobile-phone-news/windows-phone-7-8-features-leaked-with-the-confirmation_49.html)