Original ROM Backup(need quick help please)

[TomasNM]

I need to backup the original ROM image(due the warranty reason)-I would like to upgrade the OS. I know,that's an easy procedure,but I don't know how to start. Also I need a Radio backup(if possible). Please help. Thanks.

[Denis_Ukr]

look: http://forum.xda-developers.com/viewtopic.php?t=22861&start=0 or http://en.pdamobiz.com/en/forum/forum_posts.asp?TID=62
or http://forum.xda-developers.com/viewtopic.php?t=19500&highlight=restore