http://www.sipgate.com/index.html From the site: sipgate brings VoIP to your iPhone. Finally. You can use sipgate to place and receive calls over Wi-Fi using any SIP-based VoIP-service. sipgate allows you to * save mobile minutes, whenever Wi-Fi is available * bypass roaming charges * place calls at virtually no cost when travelling abroad Looking fwd to trying this one out! Nice to have a choice from the Fring app.