I just found this so I'm posting like crazy to get to the dl section:

Quote Originally Posted by joabel View Post
I have had many W580i with this firmware, since a get them from at&t... the only thing you need to do is FLASH: MAIN, FS, CDA(custom) with the firmware R8BE001_RED52 which is the latest.. then doing this you would be upgrading your phone to this firmware.. then if you want you can do a IDENTIFY and you will see your new firmware...

ITS TESTED I'VE DONE IT SEVERAL TIMES..... mine arrived with R7 and now is R8...