iCall has a closed beta of their system for the iPhone in work.

iCall allows you to route your incoming cellular network calls to your iPhone via VoIP when you are connected to a WiFi hotspot. You can also send and receive VoIP calls over WiFi.

Watch the demonstration video for more information.

Robert Poe for VoIP-News has written a handy article on how to get started making calls using the JAJAH software and network on your mobile phone.

JAJAH’s mobile VoIP service offers a ringback-and-connect type service which is described in the article.

gigaom.com carries word that the big global Telcos such as AT&T, British Telecom, Deutsche Telecom, NTT etc could be working together to create a ‘Skype rival’ for 2009.

No real detail or grit is given on the product although I would hope that it would be a SIP or at least standards-based system unlike Skype which is uses a proprietary method.

The service is said to be designed to ultimately be available for mobile devices with 3G or 4G connections so presumably the model would be direct connection or client/server connection rather than Skype’s P2P routing model.

Some more detail over in Om Malik’s article.

Picked up on Surya Andreas’ blog, we have an article detailing his trials and tribulations with testing out potential Voice over IP client candidates for his Symbian/UIQ based mobile phone.

Fring, Nimbuzz, Truphone and Gizmo are mentioned along with Skype and I-Skoot. He seems to hold Fring in the best regard at the moment for it’s general all-round abilities.