I mentioned yesterday that there were rumors flying that AT&T could be ready to allow VoIP over its 3G network with apps like Google Voice and Skype. Previously VoIP apps on the iPhone were only working over Wi-Fi connections. AT&T officially informed Apple and the FCC yesterday that it would allow 3G VoIP service. continued »

If you are an iPhone user who makes lots of VoIP calls using the Truphone app, you may want to reconsider updating your iPhone to OS 3.1. The company behind the Truphone app has issued a statement saying the current version is not compatible with the new OS update. continued »

Nimbuzz, a mobile social messenger, combining instant messaging, geo-presence and VoIP, recently announced its new iPhone and iPod touch updates (with a brand new desktop client for Apple Mac computers). continued »

Vopium today announced its latest application to the iPhone, enabling users to make free and cheap international calls. Powered by mobile VoIP and Wi-Fi technology, Vopium is now available in Apple’s App Store. continued »

A new version of fring is now available on the App Store, adding some functionality for "fringsters" to use this service on the original iPhone, iPhone 3G or iPod Touch. Using fring, you can interact with friends on all your favorite social networks including Skype, MSN Messenger, Google Talk, ICQ, SIP, Twitter, Yahoo! and AIM. continued »

After last week's rumors, Skype's iPhone client has been confirmed.  The VoIP software, which will be released on Tuesday March 31st, will be a free download and allow users to make free Skype-to-Skype calls over WiFi networks.  Alternatively, calls to landlines will cost 2.1 cents per minute. What won't be possible is VoIP over 3G.  According to Skype's chief operating officer, Scott ... continued »

Truphone has added Skype for iPhone and iPod Touch, allowing users to make calls and instant message other Skype users. This new features go live on next Monday, January 12. continued »

I'll admit that I don't make a ton of calls on my mobile phone, and generally don't worry about how many minutes I'm using. However, there are those out there that talk considerably more than I. For those people I give you iCall. continued »

VoIP company fring has announced what it's calling the world's first publicly available mobile VoIP app for the iPhone, putting the beta version out for download.  That means they've beaten rival Jajah - who recently announced their intention to release an iPhone VoIP client over the Summer - although Jajah are using the official SDK to develop their software whereas fring ... continued »

Back in 2007 there was a lot of talk about VoIP company Jajah and their attempts to bring a client to the iPhone; in the end, AT&T's definition of "conference call services" scuppered those plans and Jajah instead launched an iPhone-formated web interface for their ring-back service.  With the arrival of the official Apple SDK, however, Jajah are now apparently working ... continued »

A glimmer of hope for those iPhone owners who want a SIP-compatible VoIP client for their cellphones, as a collaboration between iPod Touch fan-site Touchmods.net and French ADSL ISP Free.fr results in a software client that allows their subscribers to make free phonecalls via their Apple device.  Called Siphon, the app is currently locked to the Free.fr network (the ISP ... continued »

Over at Apple-Touch.com, our iPod Touch obsessed sister-site, we've been gleefully watching the work of some VoIP-loving hackers as they not only developed a SIP-compatible app for the PMP but a plug-in microphone attachment to go with it.  Now they're turning their attentions to the iPhone, which has long been pretty much at the mercy of whichever carrier has exclusivity ... continued »