Fring allows a user to configure IM/Chat account from most of the famous chat clients like GTalk, Yahoo, Skype etc and make free calls to friends. You can also use your Skype or SIP account to make free calls to mobile phones as well. Follow these instruction to setup Fring on Your iPhone.
Once you have installed Fring on your Phone, configure with the IM/Voip clients you wants to setup. For e.g. say you wants to call your friends on Gtalk, configure your GTalk account by typing in your Google credentials and you will see a list of friends already added in GTalk account, just tap on the name select if you wants to make a call or chat.
You can also use this app to chat with your Yahoo and AOL friends. This is an amazing application and work even when its not active on screen that is unlike other application on iPhone, you can press home button and start playing games or do anything and if someone pings you, you will get a notification about the same.
