It wasn’t too long ago that Google released the Android 2.3.4 update that includes video chat through Google Talk. We are today learning that the Nexus S on T-Mobile won’t do video chat over 3G. It seems that T-Mobile is blocking it from working, as it works on Sprint’s 3G networking using the Nexus S 4G. When you try to start a video chat over T-Mobile’s 3G network, you will be greeted with a alert saying “You must be connected to a Wi-Fi network to start a video chat.”