Have you applied this yet and can you comment on if reception is improved at all? On t-mobile UK with a unbranded white Hero.
The version details and links are below, note that the files include boot and system images only, I have elected not to include recovery, radio etc. I have however posted the radio seperately.
If your device has a ROM revision not listed here, please post a nandroid backup so I can create an update.zip! Many thanks to those who have already contributed backups so far.
Generally speaking these shouldn't require a wipe, but I can't guarantee that. Also, note these are completely stock and unrooted - you'll need to root afterwards if required.
HTC Generic 1.76.405.6 - download
Orange UK 184.108.40.206 - download
T-Mobile UK 220.127.116.11 - download
63.18.55.06_6.35.04.25 - download
63.18.55.06_6.35.05.15 - download