Just in case you still haven’t found your iPhone VoIP solution, you have another option

A company by the name of iCall is offering the ability to both make and receive free phone calls on your iPhone when in range of a wireless hotspot. What’s interesting about this is that you can also hop on and off of the VoIP service as you enter and leave a hotspot, as shown in the YouTube video (after the break). It also has access to your entire address book on your iPhone, along with a customizable voicemail feature. This application should be available next week when the SDK App Store comes out.

Click through to see the video.