This is the second firmware upgrade for the Windows Phone handset
Although we were expecting Windows Phone 7.8 update to arrive in early 2013, it looks like those who own Windows Phone 7.5 handsets have already found a way to upgrade their smartphones.Either directly from Nokia’s Navifirm servers or via Nokia Care Center, Windows Phone enthusiasts can now update their older devices to WP7.8.
Nokia Lumia 510, one of the cheapest and less-featured Windows Phone devices, has already had a Windows Phone 7.8 update released but now a new one has been recently spotted on Navifirm.
According to WMPoweruser, the second Windows Phone 7.8 update for Nokia Lumia 510 upgrades the firmware from version 12460 to 12490.
For the time being, there are no additional details regarding the changes included in this update, but stay tuned for more info on this one.