Originally Posted by bud79
Do I need to e on official 3.55 or can i upgrade from kmeaw? if so how do i get back to official 3.55?
Through recovery mode. Here's a video of upgrading from 3.55 cfw -> 3.55 ofw -> 4.21 Rogero:
Upgrade from 3.55 CFW to Rogero 4.21 CFW - PS3 - YouTube
And read these threads (at least twice