Samsung galaxy s2 different to samsung galaxy s2 i900?

Um, the i900 is not the Galaxy S II. It's a completely different phone called the Samsung Omnia. This phone is really, really old and Samsung no longer supports this phone. Plus, you'd hate it since it runs on Windows Mobile 6 which is an OS that is no longer supported by Microsoft (since it's now replaced with Windows Phone). Galaxy S II is faster, run on Android has a better screen and well, it's just better by a lot. --------- i9100 is the Galaxy S II. But you could be asking the difference between the US models and the international model (i9100) like Velocity below me said, yes? If yes, well the difference isn't that huge. The software are mostly the same. Just a slightly few different wallpapers and icons and some bloatware from each carrier and the screen size is also different (T-Mobile and Sprint version only). Also, the T-Mobile version uses a Snapdragon processor which is kinda slower than the versions with the Exynos processor. Software can be kinda different. By that I mean that the international version is getting the ICS update already while the US versions still have to wait (god knows when it will happen). And they have the 4 capacitive buttons while the international version doesn't (has only 3 buttons with 1 physical and 2 capacitive).