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Mobile VoIP is the application of Voice over IP technology for mobile or cell phones.
There are several methodologies by which a mobile handset can be integrated into a VoIP network. One implemetation turns the mobile device into a standard SIP client, which then uses a data network to send and receive SIP messaging, and to send and receive RTP for the voice path. This methodology of turning a mobile handset into a standard SIP client requires that the mobile handset support, at minimum, high speed IP communications. In this application, standard VoIP protocols (typically SIP are used over any broadband IP-capable wireless network connection such as EVDO rev A (which is synchronously high speed - both high speed up and down), HSDPA, WiFi or WiMAX.
Another implementation of mobile integration uses a softswitch like gateway to bridge SIP and RTP into the mobile network's SS7 infractructure. In this implementation, the mobile handset continues to operate as it always has (as a GSM or CDMA based device), but now it can be controlled by a SIP application server which can now provide advanced SIP based services to it.
Mobile VoIP will require a compromise between economy and mobility. For example, Voice over Wi-Fi offers potentially free service but is only available within the coverage area of a Wi-Fi Access Point. High speed services from mobile operators using EVDO rev A or HSPDA may have better audio quality and capabilities for metropolitan-wide coverage including fast handoffs among mobile base stations, yet it will cost more than the typical Wi-Fi-based VoIP service.
Mobile VoIP will become an important service in the coming years as device manufacturers exploit more powerful processors and less costly memory to meet user needs for ever-more "power in their pocket". Smartphones in mid-2006 are capable of sending and receiving email, browsing the web (albeit at low rates) and in some cases allowing a user to watch TV.
The challenge for the mobile operator industry is to deliver the benefits and innovations of IP without losing control of the network service. Users like the Internet to be free and high speed without extra charges for visiting specific sites. Such a service challenges the most valuable service in the telecommunications industry - voice - and threatens to change the nature of the global communications industry.
VoIPonMobile.com provides Mobile VoIP for Cheap Free Cell Phone VoIP Calls with Nokia VoIP SIP Client iPhone Windows Mobile SIP including Motorola, Samsung, HTC and more. Mobile VoIP is the fastest growing segment of the Voice over IP marketplace and many analysts predict that 2010 is set to be the year that Mobile VoIP moves to the forefront of communications technologies disrupting the status quo and VoIPo3G -VoIP over 3G networks or Mobile VoIP- will be more important than VoWLAN -Voice over Wireless networks- for operators and 3rd parties over the next four years.
Nokia has long been a leader in Mobile VoIP technology. When you select Nokia SIP phones you are taking a big step forward in giving yourself the best that Internet telephony technology has to offer. With a wide selection of phone models to choose from, Nokia VoIP phones with VoIP support will provide you with high sound quality and reliable performance.
Whether you choose a Nokia SIP phone that comes pre-loaded with VoIP software or a model that requires a simple software download, you will be on your way to enjoying crystal clear communications for a fraction of the cost.
There are huge number of Windows Mobile users who still never used VOIP due to multiple incompatibility issues in the past.
Actually Windows Mobile 6 has the capability of SIP which the operators do not enable. This feature is called Internet Calling and once this features is enabled you can start making VoIP calls with your Windows Mobile SIP phone.
Some of the Windows Mobile 6 phones that support VoIP calls are HTC, Samsung, Motorola, i-Mate, LG, Palm, Sony-Ericsson.
With a choice of SIP apps available now for iPhone, there’s literally no limit to the number of calls that can be made for free or at a massively reduced rate.
Android is already makings its way into your phones and there are more and more android phones coming up in the market. Now you can start using your Anroid phone for Mobile VoIP calls using new powerful open source Andorid SIP VOIP client SIPDROID. Some of the android phone manufacturers are HTC, LG, Motorola, Samsung, Sony Ericsson, Droid and some new Android Phone manufacturers are coming as well.
Fring is a free mobile VoIP software for Symbian S60 mobile phones, allows you to talk & IM via your handset's internet connection to other mobile phones and PC-based services with SIP providers such as VoIPonMobile.com, as well as Skype, MSN Messenger, ICQ, Google Talk at no extra cost.
Nimbuzz is another free mobile VoIP software for Symbian S60 mobile phones, and allows you to talk & IM via your mobile phone's internet connection to other mobile phones and PC-based services with SIP providers such as VoIPonMobile.com, as well as Skype, MSN Messenger, ICQ, Google Talk at no extra cost.
VoIP Direct enables cheap international calls, by assigning unique local phone number for your contacts overseas.