well u can download from download section...but u have to stay here 2 months and have 20 posts or pay x eur for download access :P
u can use setool or xs++(recomended)
or try:Under Construction iProTebe.cz to download xs++(recomended) or setool
basicly u need thease infos:
CDA:
Firmware Version:
EROM CID:
EROM COLOR:
Platform:
witch can be obtained trough xs++(at start) or setool(by pressing identify button)
or better yet try an onlyne upgrade :D Update Your Phone Online - Top Sony Forums