Windows Phone 7.8 upgrade available via Nokia Care
We went to a Nokia Care to get the upgrade for our Nokia Lumia 510, which is already selling with Windows Phone 7.8 out-of-the-box, and from there we got to know that the Windows 7.8 upgrade is available on the Nokia Lumia 900, 800, 710 and 510 but Lumia 610 users will have to wait.
As you can see in the image above, the home-screen has re-sizable Live tiles. The 7.8 upgrade brings in the Ringtone Maker and Bluetooth Share apps. Users can now also set the Bing images as wallpapers over their Lumia smartphones.
UPDATE: The Windows Phone 7.8 upgrade is available in India for Nokia Lumia 610 too!