Internetcalls on your mobile: MobileVOIP App
Download the MobileVOIP app:

MobileVOIP is a free application which enables you to use Internetcalls on your mobile phone! Download MobileVOIP and log in with your Internetcalls username. You can now use your regular Internetcalls credit for calls from your Mobile Device!
Choose your mobile device:
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iPhone / iPod / iPad more info
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Android more info
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Nokia / Symbian more info
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Windows Phone more info
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Windows 8/RT more info
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Android Tablet more info
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iPad more info
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BlackBerry more info
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Nokia Asha more info
Can't access
Android Market ,
iTunes ?
Download the MobileVOIP file here.