Mobile VoIP Overview
Mobile VoIP, also known as mVoIP, is simply another way to utilize voice over ip technology on a computer network. Two types of technology are mainly used – cordless and 3/4g. The cordless protocols are mainly used for short range solutions, or where all phones are connected over the same local area network (LAN). 3/4g is used for longer ranged distances.
There are a few different ways mobile phones can be used with VoIP technology. The most common way is turning the handset into a normal SIP client. This uses a chosen data network to send & receive SIP messaging and RTP for the voice. To do this the handset must have high-speed data transfer. This method uses standard VoIP protocols over broadband capable wireless network connections, such HDSPA, WiFi or WiMAX.
Mobile VoIP requires a compromise between portability and cost. Eg. Voice over Wi-Fi is mostly a free service but is only available within the range of the access point you are connected to. Cordless protocols offer very good voice support but it requires all base stations to communicate through one LAN as the hand-off protocol is not usually offered by carriers or most handsets.
Some good examples of Mobile VoIP companies are:
Mobile Voip
Using MobileVOIP you can make free VoIPcalls from your mobile phone – as long as you stick to the fair usage policy and don’t abuse it. You can make phone calls to any country in the world at the cheapest possible rates. MobileVOIP currently support iPhone, Android and Symbian phones. Simply download the free MobileVOIP app from your APP market and register with one of the supported Voip brands.
Skype
Skype is a bit of software that makes talking to other people worldwide easy. With Skype you can connect with anyone that also has the software for free. Skype mobile is the smartphone version of the popular VoIP phone service. With Skype mobile and a mobile phone that has WiFi facilities you can call your Skype mates for free and everyone else for the same cheap rates as you are able to with your computer based Skype program.
http://www.skype.com
fring
fring is a mobile internet service and community that allows users to access and interact with a variety of communication services such as Skype®, MSN® Messenger, Google Talk™, ICQ, SIP, Twitter, Yahoo!™ and AIM®. Using fring, you can make and receive calls as well as message all your friends. The clever thing is it will use your data plan or a WiFi connection rather than use up your valuable minutes. You can even make affordable local and international calls to land-line and regular cellular numbers using your Skype account or almost any VoIP service. fring is compatible with Symbian 8, 9.1, 9.2, Windows Mobile 5 & 6 and UIQ handsets.
http://www.fring.com
Mobiboo
Mobibbo is the UK’s first commercial Mobile VoIP provider offering VoIP service over WiFi networks.With Mobiboo’s tovo WiFi phones you can make calls from WiFi hotspots worldwide and eliminate mobile roaming charges. In addition to offering users Mobile VoIP service, Mobiboo also offers a soft-phone client for a PC or laptop that allows calls to made over a fixed or WiFi internet connection.
Jajah
JAJAH is an innovative and simple way to make cheap phone calls using the Internet without headphones, microphones or having to install any software at all. JAJAH connects two standard telephone , whether they are landline or mobile, local or anywhere else in the world, regardless if the owner is connected to the Internet or not. Needing nothing more than a standard website connection, JAJAH users simply plug-in their phone number and the number that they wish to be connected to and within seconds their call is connected. With JAJAH Direct, one does not even need to visit the JAJAH website to make low cost international calls.
http://www.jajah.com/