App lets you make free calls with your smartphone over 3G at any time

"And during a call, you can keep the conversation going while you switch to another task, such as checking a movie listing or reading an email. We've also updated the app's graphics to support iPhone 4's Retina Display."

Back in May Skype introduced 3G Skype-to-Skype calls on the iPhone, but warned the service would only be free until the end of August 2010. The company has since revised its policy, announcing there will be "no additional charges for calling over 3G."

iPhone users are rejoicing over the news. "I've been waiting years for this, thank you so much for finally making this happen," "Great news! I'm pleased to see that you fine folks have changed your mind regarding the additional fees for 3G calling," and "congratulations on your promotion from my second homescreen to my first," commented users on Skype's blog.

The new app

The new app, called Faceplant, will inform iPhone 4 users when their friends are available to video chat with push notifications. The app also lets you leave or receive video messages with your friends when one of you is not online.