I recently upgrade my Omnia II to Windows Mobile 6.5 from the Samsung Website.

The upgrade to Windows Mobile 6.5 for Omnia 2 is now available on the official website of Samsung in some countries. You can only upgrade your phone through the website of Samsung in the country that is your OMNIA II came from (obviously, by official ways... you can find many other ways and roms here in Modaco comunity to upgrade to WM 6.5 no matter what country your phone came from). I will explain how I did it from the Singapure website...

How do you discover what country is your Omnia II? Go in "Settings", "Advanced Settings", "System", "Version", "Device". You will see three codes: PDA, CSC and PHONE. Everyone starts with I8000 (which is the code of Omnia 2). In CSC, see if the following 3 characteres (after the code I8000) are XSO, and in PHONE see if the two characteres following are DX. If so, your Omnia II came from Singapore (as well as mine).

You can find codes for the other countries here in the Modaco comunity, but I will post some codes that I find here for help you:

Codes for CSC (the 3 characteres after I8000):
ATO AUSTRIA
AUT SWITZERLAND
CNX ROMANIA
COA ROMANIA
CYO GREECE
DBT GERMANY
EUR GREECE
FOP SPAIN
HAT ROMANIA
IRD SLOVAKIA
ITV ITALY
MOB AUSTRIA
MOT SLOVENIA
MTL BULGARIA
OMX BULGARIA
ORO ROMANIA
PAN HUNGARY
PLS POLAND
PRO NETHERLANDS
PRT POLAND
SEB AUSTRIA
SEK UKRAINE
SER RUSSIA
SIM SLOVENIA
SMO SERBIA
SUN SWITZERLAND
SWC SWITZERLAND
TPH PORTUGAL
TRA CROATIA
VGR GREECE
VIP CROATIA
WIN ITALY
XEB BELGIUM
XEE SWEDEN
XEF FRANCE
XEH HUNGRARY
XEN NETHERLAND
XEO POLAND
XEP PORTUGAL
XEU UK
XEZ HUNGARY
XSO SINGAPORE

Codes for PHONE (the 2 characteres after I8000):
BD Greece
CP Finland
DB Vietnam
DC Thailand
DD India
DT Australia
DX Indonesia, Malaysia, Philippines, Singapore, Vietnam
DZ Malaysia, Singapore
JA South Africa
JC Algeria, Morocco, Nigeria, South Africa, Tunisia
JP Arabic
JR Arabic
JV Algeria, Egypt, Iran, Iraq, Kuwait, Morocco, Nigeria, Oman, Pakistan, Saudi Arabia,South Africa, Syria, Tunisia, Turkey
MT Switzerland
XA Austria, France, Germany, Italy, Netherlands, Switzerland, United Kingdom
XB Denmark, Norway, Sweden
XC Portugal, Spain
XD Croatia, Czech, Hungary, Slovakia
XE Bulgaria, Estonia, Kazakhstan, Latvia, Lithuania, Russia, Ukraine
XF Bulgaria, Croatia, Romania
XX Austria, Belgium, France, Germany, Hungary, Italy, Spain, United Kingdom
ZC China, Hong Kong
ZH Hong Kong
ZT Taiwan

The 3 last characteres in PDA, CSC and PHONE:
* Release years:
D = 2004
E = 2005
F = 2006
G = 2007
H = 2008
I = 2009
* Release months:
A = January
B = February
C = March
D = April
E = May
F = June
G = July
H = August
I = September
J = October
K = November
L = December