Firmware của i900 check here

AKHH5: http://www.mediafire.com/download.php?sro92ep8gvx

ATHH5: http://www.mediafire.com/download.php?zqlkwvuzqyi

BKHH6: http://www.mediafire.com/download.php?1inot2m2jyz

BOHH5 (OFFICIAL T-MOBILE UK SHIPPING ROM, tested OK): http://www.mediafire.com/download.php?e5anzsexa8m

DTHJ5 (full update, tested OK, latest English): http://www.mediafire.com/download.php?zhnm1jzgmnf

DXHG4 (full update, tested OK): http://www.samsungmobile.com/promotion/omnia/index.jsp

DXHH1 (full update, tested OK): http://www.modaco.com/content/link/271999/details/

DXHH3 (full update, tested OK!): http://www.mediafire.com/download.php?xocswrevoyj

DXHI1 (full update, tested OK): http://www.mediafire.com/download.php?mtze1znuumn

DXHI2 (full update, tested OK): http://www.mediafire.com/download.php?5zzyizijuyl

DXHI3 (full update, tested OK): http://www.mediafire.com/download.php?uvzgnhtygmm

DXHJ1 (full update, tested OK, latest English ROM): http://www.mediafire.com/download.php?dt1wouiltmn

SAHH2 (full update, it's in POLISH, tested OK!): http://www.mediafire.com/download.php?immelub5yez

XCHG5 (Portugese full ROM img for GrandPrix, tested OK): http://www.mediafire.com/download.php?62iv6plvxhy

XGHI5 (German full ROM img for GrandPrix, untested): http://rapidshare.com/files/15094863..._X_G_H_I_5.rar

XXHH1 PDA (tested OK): http://www.mediafire.com/download.php?icwabgoftw2

XXHH1 Radio (tested OK): http://www.mediafire.com/download.php?q7vikkxlxnm

XXHH3 (radio only, tested OK(details!): http://www.mediafire.com/download.php?3f7mpacufai

XXHI2 (radio only, tested OK): http://www.mediafire.com/download.php?tu2gjx2jm31

ZHHH1 (full update, Hong Kong English, no predictive SIPs, Chinese input, tested OK): http://www.mediafire.com/?oymyjxf1jpx

ZHHH2 (full update, Hong Kong English, tested OK): http://www.mediafire.com/download.php?5ieo5vdmb7a

GrandPrix 1.5.2 XP: http://www.mediafire.com/download.php?mzzjnjooyzh
Ký hiệu ngôn ngữ
i900 - > model designation (SGH-i900).
XX - > region / network carrier designation (XX = Spain - open Market).
G - > release year (E = 2007).
K - > release month (K = November).
1 - > version number.

BD Cyprus, 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

- Network carrier codes:

AE SFR, France
AI Tim, Italy
AM Vodafone
AN E-Plus, Germany
AO O2
AS KPN, Netherland
AU Mobilkom, Austria
BB Tmn, Portugal
BF Optimus, Portugal
BG Telefonica, Spain
BM Swisscom, Switzerland
BN Amena, Spain
BO T-Mobile, Germany
BU Vodafone
BV Orange, Switzerland
BW O2, United Kingdom
CD Proximus, Belgium
CG Telia Mobitel, Sweden
CH SingTel, Singapore
CK Tele2 Comviq, Sweden
CT Tdc, Denmark
CU One, Austria
CV Telenor, Norway
DT Optus, Australia
DV Telstra, Australia
EF Celcom, Malaysia
JB Vodacom, South Africa
MD Telia Sonera, Finland
MJ Vodafone, Italy
MM Tele Ring, Austria
MV NetCom, Norway
NA Nrj, France
NB Tele2 Norway, Norway
NE H3g Nordic, Sweden
NP H3g, Italy
SS Vodafone, Japan

Release years:

D = 2004
E = 2005
F = 2006
G = 2007
H = 2008

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