DemandVoIP Inc.

Callbacker是全球流行的，非常实用的长途电话和国际电话应用！√ 来自美国的优秀App，各方面优于Skype√ 可以显示您的主叫号码√ 将您的iPad/iPod touch变成iPhone√ 绝

Simple free phone call app with cheap rates! You can make cheap VoIP calls with Vopeer! Vopeer is a