Download VOPIUM App Free for cheap International calls

Vopium is a free application which enables you to make cheap international calls, SMS, perform free Wi-Fi calls, backup your contacts and much more directly from your mobile phone and now you can get 30 free minutes of international calls when you signup. No monthly fee, no call set-up charges or hidden fees. Only pay for the minutes you talk. Apart from the 30 free minutes and 30 SMS, you get 5 euro free credit every time you recommend Vopium to a friend.
How this works:

With Vopium you can call friend and family abroad at very low rates directly from your mobile phone. Simply install Vopium and allow the application to run in the background while you perform your calls. Vopium automatically detects when you dial an international number and routes your call in the cheapest possible way.

Make free Wi-Fi calls:

Vopium not only gives you cheap international calling alternatives but also provides Free Calling in Wi-Fi hotspots.
Setup Wi-Fi on your handset, and call the other party (on Wi-Fi) for free without any time limit!

Backup your contacts using the Vopium sync:

You will never have to worry about losing your phone again. Vopium Sync securely backs up your contacts and calendar entries directly to your online Vopium account. Simply press the Sync option from the application and choose Contacts or Calendar to back up your most important data.

Supports major platforms like Java, Symbian, BlackBerry, Windows Mobile, iPhone and Android. Supports more than 900 devices.

Check Supported Handsets and once you click on your phone model in this link, you will get how to download this application.