I use both gTalk on Desktop and Google Talk on Android (phone) - at the same time. However, it only seems to sync from Desktop to Android and not the other way round? At the start of the conversation ...
When I used Android versions up to 2.x, some apps like Google Talk and Android Market (now Play Store) required background synchronization to be activated via Settings -> Account and synchronization ...
Android Market won't download apps and Google Talk won't sign in after changing to @gmail.com address
I have tried the suggestions here and here with no results. Google suggest changing back to @googlemail.com, waiting two days and restarting the phone, but that hasn't worked either. Anyone had any ...