Knew it would happen to me, I'm Vodafone UK. FRG83D build, not just FRG83....think its voda's own version...anyway followed the link above no problems but when tried to flash in recovery;
Install from sdcard
Finding update package
Opening
Verifying
E:failed to verify whole file signature
E:signature verification failed
Installation aborted
Now, I placed update.zip in /sdcard folder on its own. Can't seem to move it into the root folder using Astro. I think it can see the update as the above log seems to show. Is it vodafone and their meddling ways or is the update file in the wrong folder? Help guidance and most probably step by step destructions appreciated chaps