Free VoIP Calls For iPhone.
iPhone passed more than 4.4 million units in the world wide sale. Due to it's high price it is locked with carriers in many countries. The clients must choose a plan for their usage of phone calls, SMS short messages and data transfer.
As the iPhone is capable of connecting to the internet, Apple's iTunes offer thousands of Apps to download and use it with the Apple's touch phone. There are many kinds of Apps developed by individuals and companies. In these Apps the VoIP app is catching iPhone 3G users like a fire as it reduces the call charges.
At the moment these VoIP apps allow the user to connect through Wi-Fi or internet data plan and make Free calls to their friends who too are members of the particular VoIP company. These companies too allow voip calling plans for their members at very low price. Some offer the plan for month, some offer as on the go while others offer per year. It is better to get the Apple approved VOIP App from the iTunes. Other wise your iPhone3G may give you troubles Here you can find some of their web sites.
Fring :-
Fring bringing PC-benefits to the mobile, and allow you to saves money as it lets you to make affordable local and international calls.
http://www.fring.com
Truphone offers VoIP App :-
Truphone is offering an App for to call Overseas calls through wifi hotspots.
http://www.usa-links.com/2009-calendar-wallpaper/
Packet8 MobileTalk for iPhone. :-
You will not need calling cards, pins, data plan or connection fees to get the High quality digital calls.
http://mobiletalk.packet8.net/
Nimbuzz for iPhone Voip Calls. :-
It offers Chat with IM and social networks!, Landscape mode chat!, Call your IM buddies for free over Wifi!, Broadcast your life with personal message!
It supports the following Skype, Yahoo! IM, AIM, GTalk, MSN, ICQ, Jabber, Facebook, MySpace, StudiVZ, Gadu Gadu, Hyves
http://www.nimbuzz.com/es/iphone/download
JAJAH too offers iPhone App. :-
JAJAH's iphone App is under review. With JAJAH, users can make the International call for only 3 cents a minute and there are no hidden costs, contracts, downloads or special equipment. JAJAH works over your regular phone lines and does not require a wi-fi connection.
www.jajah.com
iCall App for the iPhone. :-
It offers the VoIP call facility along with a feature in which the app's ability to switch from a cellular call to a wifi call without interrupting the conversation.
www.icall.com