It is really a very good news for all iPhone users ad Apple has lifted the ban on VoIP over the AT&T 3G network. So now you can make free calls from your iPhone if you have got an unlimited data plan. Apple has updated the iPhone developer SDK, which can be used for iPad, to allow VoIP over cellular networks. iCall is the first VoIP application that functions on the iPhone and iPod Touch over cellular 3G networks. After iCall, Fring also announced 3G Video and Voice calls for iPhone.

iCall allows you to make and receive phone calls over 3G as well as Wi-Fi. You can switch your cell phone calls to VoIP and you can even receive the calls when the app is not running. iCall is compatible with iPhone, iPhone 3G and iPod Touch.

You can also use the very popular App, Fring for iPhone to make free calls over 3G. iPhone Fring users can now call, video call, chat and more for FREE over the 3G network.

As the iPad supports iPhone Apps you can use these 3G VoIP Apps on your iPad to make free calls to your friends.