Skype today released the new version of its iPhone application.

Available to download from the Apple App Store today, this update allows iPhone users to make and receive Skype-to-Skype calls, and to call mobiles and landlines around the world over their 3G data connection.

Skype-to-Skype calls on 3G will be free for a trial period which will run until the end of 2010, Skype said. Details of pricing will be announced in the coming months. Skype-to-Skype calls over WiFi will still remain free.

Additional new features of the Skype for iPhone application include:

- Near CD-quality sound for Skype-to-Skype calls using wideband audio on iPhone 3GS or 2nd generation iPod touch and onwards.
- Enhanced call quality indicator, which will help customers choose the best moment to call.
- Improved start-up time
- Rapid access to the dial pad from the home screen

The new version is compatible with the iPhone, iPhone 3G, iPhone 3GS, iPod touch and iPad. Skype requires iPhone OS version 3.0 and above.

Calling functionality is available on iPhone, iPhone 3G, iPhone 3GS and 2nd generation iPod touch onwards. iPod touch requires a compatible headset with a microphone.

The Skype for iPhone application is available to download for free from the App Store on iPhone and iPod touch, or at www.skype.com/go/iphone