Here’s how the firmware names are coded (basically):
F480XEHJ1
…for example means:
F480 … phone-type,
XE … country/branding code:
(XE = open europe, no branding, East-European languages, English and German included)
(XX = open europe, no branding, Middle Europe)
(AU = branded version for A1 Austria)
HJ1 … date and firmware release number, alphabetically coded
H = year 2008, J = month (october), 1 = release nr..