Skype gives you free calls and instant messages to anyone else on Skype. You can also call landlines and mobiles and send SMS anywhere in the world, at great rates. Skype is free to download and easy to use.

Free Skype-to-Skype calls

With Skype on your iPhone or iPod touch, simply sign into Skype from any WiFi zone, and call friends and family on Skype totally free.

See who’s online and instant message them

. Sign into Skype via a mobile data connection (3G, Edge, GPRS) or WiFi and check who’s online - then instant message them whenever, and wherever the mood strikes.

Save money on calls and texts to phones abroad
 
Call phones anywhere in the world at great rates from any WiFi zone, and send low cost texts (SMS) via a mobile data or WiFi connection. 
 

Skype website http://www.skype.com/go/iphone