The Samsung Galaxy S 4G from T-Mobile now can be upgraded to 2.3.3 Gingerbread Android OS.
If your Galaxy S 4G smartphone recently running in 2.2 Froyo firmware like the lists below:
The latest firmware update can now be downloaded from samfirmware.
Android Version 2.3.3 Gingerbread
Build date: June 7 2011
CSC version: TMB
Installing and Flashing Procedure using ODIN is here: