Install Windows Phone 7.8 on your Nokia Lumia WP7.5 device via NaviFirm
Tired of the wait for that WP 7.8 update for your Nokia Lumia WP 7.5 device?
Feeling daring? Update now via NaviFirm.
CAUTION: the process will utterly wipe your device, and can brick it if things go wrong. And I just told you so
You will need the NokiaCare Suite 5 and something else, but I'll hand over to Softpedia for all the INFO & Downloads.