Android is an operating system specially adapted for mobile phones and handsets launched by Google. If you are using a phone running Android, like the Nexus One, the HTC Hero, the Samsung Galaxy, to name but a few, you can take advantage of the power of VoIP services to make free or cheap calls on your mobile. First, you need a connection, either through Wi-Fi, 3G or WiMAX and get subscribed to one of the following VoIP service providers.
whoch voip services from www.cheap-international-callingcard.com：
whoch is a leading VoIP services provider for mobile phones in the sense that has been the first to provide a VoIP application for the iPhone and for the Nexus One. Truphone allows Android users to make free calls to other Truphone users over Wi-Fi, with cheap rates otherwise. It also allows the user to make partly-VoIP calls over their GSM (cellular) network, through its Truphone Local plan. This allows the user to use the cheap voip services anywhere outside Wi-Fi. Note that Truphone on Android does not support 3G so far.