Google talk was one of the coolest Google services, since it was extremely simple and easy to use for many years now. A few months ago, Google upgraded the Android version of the Google talk app, into Google Hangouts. Hangouts brought some new features, but, at the same time, the main and coolest features of the service (easy to use and simplicity) are now gone. I could not get used to Hangouts for a few months now, so I found a way to uninstall it. If you, just like me, want the old Google talk application back, this is what you need to do in order to revert to the good old version of the Google IM service.
Go to the Play Store, than go to My Apps, find the Hangouts app, tap on it and than tap Uninstall. The Hangouts app will be uninstalled and you will have the good old talk back.