VoIP/SIP: Economy and Mobility PDF Print E-mail

Nowadays VoIP-services become more and more popular all over the world. VoIP stands for Voice Over Internet Protocol, a communications protocol that allows for telephonic communication via the Internet. It means that you may use Internet line instead of ordinary service delivered by your telephone company. In other words, voice from caller is being encoded and transmitted through IP-networks as digital data.  

At the very beginning it seemed senseless to change old good phones to something else. But very soon users understood indisputable advantages of VoIP-calls in comparison with traditional telephone services. The main merits of using VoIP are considerably lower price and more interesting possibilities and functionality.

VoIP-calls are cheaper than the common telephone calls because of voice signals are digitized and compressed. VoIP allows transmitting different data packets through the same lines, completely employing their capability, following by the lowering costs for VoIP-calls.

In some cases VoIP-calls are almost free. The user pays for internet traffic and VoIP does not involve any extra charges. That is why people consider this service to be free, the only thing they pay for is internet connection. Actually, in case of unlimited data plan, it is not crucial.

And when you use ordinary telephone connection you usually pay for every minute. In this case time is really money. And if your friends live in another town or another country calling them you always remember about your telephone bills.

And how would you like to use your mobile phone to call your friends or relatives living abroad without having to pay enormous fees? VoIP programs for mobile devices let you make phone calls over the internet for free or for a very low cost.

Voice and chat software like Skype allows users to make calls over the internet to other people using the same program and to make cheap calls to landline or mobile phones. While it’s great to be able to make these calls from PC, lots of software developers realize that people would like to use this technology on their cell phones and save their money. With applications like Skype, fring, Gimzo, sipManiac  it is possible to make cheap and good-quality VoIP calls from your mobile.

Regardless of which mobile VoIP-software you use, you’re going to need a data plan. An unlimited data plan costs from $6 per month to $25. The applications themselves are either free or cost from $15 to $25, but all of them require access to the Internet through your mobile. 


The VOIP solution number one is Skype. Though it does not mean that it was the first one to appear but this service is the most popular one. Founded in 2003, Skype has changed the way people communicate. Skype has more than 405 million users all over the world.

Skype is used almost everywhere on Earth. Talks over Skype can take place on PCs, cell phones and special devices for Skype. Skype certifies and sells hundreds of hardware devices, and works with a great number of third-party developing companies who have made software to extend Skype’s functionality.

For quite a long time uses associated VoIP with Skype and nothing else. Development of mobile VoIP services has absolutely changed this situation. A great number of VoIP clients appeared. And some of them are not worse but even better than Skype. Today we’ll try to observe the most interesting solutions.


Fring uses your GPRS, 3G, or Wi-Fi connection to make peer-to-peer VoIP calls, send instant messages, and talk through VoIP applications. This program supports the following services: SIP, Skype, Google Talk, MSN Messenger, Twitter, ICQ, AIM and Yahoo. Fring also has its own VoIP offering, so you can make calls to other Fring user with appropriate client on his cell phone.

You may download Fring through an SMS link that can be sent from the company Web site. Then you should sign into Fring account, which you create on the Fring Web site before downloading to your phone. And finally you log Skype and Google Talk accounts. It’s very convenient that buddies from each of these services are shown on the same contact list.

There are versions of Fring which support Symbian 8 & 9 (S60 2nd & 3rd edition), S40 (2nd, 3rd & 4th edition), Java ME, Linux и UIQ, Windows Mobile 5 & 6, iPhone.

The latest Fring for  Symbian S60 is more stable than ever and has better sound especially for 3G and EDGE. As for WiFi connection some of the users say that sound is not good enough and delays are noticed.  Speakerphone support is added for smartphones running on top of Symbian 9.2 (S60 3.1), and file transfer is now enabled for Yahoo! IM and Skype.

As for the Windows Mobile version, it supports auto-roaming between 3G and WiFi.  More languages are added so the user may choose among English, French, Spanish, German, Chinese, Italian and Russian.

Official Fring for iPhone and iPod Touch limited to Wi-Fi for VoIP due to Contractual Agreement with Apple.


Gizmo5 is often compared with Skype. Really principles of these services are similar. Both let you make free PC to PC calls and cheap calls to phones all over the world. Unlike Skype though, Gizmo5 is based around open protocols, SIP for VOIP and Jabber for IM. This has the advantage of allowing Gizmo to connect with other networks using these protocols including Yahoo, MSN,  AIM, ICQ, iChat, Jabber, QQ, XMPP, Gadu-Gadu and MySpace IM.  

Gizmo has versions for computers and S60, Palm OS and Java phones. The PC and S60 applications support IM and SMS over either WiFi or GPRS/UTMS data and voice calling using WiFi only.

Besides calling to other Gizmo users it is possible to call landlines and mobile devices as well. The rates are relatively low. The application also provides voicemail, chat, and avatar uploads so users can see whom they are talking to.


sipManiac is a VoIP application, which is comparatively new but undoubtedly interesting. It is compatible with the most popular mobile phones and supports BlackBerry, Windows Mobile, Symbian OS, Android, iPhone. SipManiac uses GPRS, 3G, or Wi-Fi connection. 

Using sipManiac – is the easiest way to make your mobile calls cheaper. After installing the application, you fill in your account and that is all.  sipManiac is ready to work on your cell phone. The interface is very simple. When you open phonebook, the program will ask you what kind of calls to choose: GSM or VoIP.

sipManiac includes two great features: SMS and file transfer. With sipManiac, you can send text messages from your phone, and send and receive files with you contacts around the world.

You can send and receive documents on the move.

Of course, file transfers are secure and private, so you can send sensitive documents in the knowledge that they’re safe, even across unsecured WiFi networks. sipManiac uses SRTP (The Secure Real-time Transport Protocol). It provides encryption and decryption of the data flow and its confidentiality and protection.

When you’re abroad and in a WiFi zone, sipManiac is a great way to avoid mobile roaming charges to make calls and send messages to friends and family. Of course, roaming charges may apply if you’re using a 3G network, so check with your operator before doing so.

In sipManiac STUN/TURN/ICE are used. It helps to optimize data traffic hence makes quality of sound substantially better on the comparison with other applications.

The new VoIP client has a number of merits: very simple interface, wide functionality, data protection, compatibility with the most popular mobile phones, optimized traffic and good sound quality. And with the ability to make calls over cellular data or Wi-Fi connections, you won’t be restricted geographically. This is how mobile VoIP should be.

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Customer Quotes

George Witney, VoIP consulter, UK told us:

I was impressed by the VoIP client sipManiac today. It's one of the best VoIP clients on the market which I've kept in my hands. Stylish and easy to use. I have installed it on my Android G1 and in 30 seconds made the first test call to my friend. The audio was loud and clear. Connection stable. Thanks guys for involving me in Beta testing. I'm waiting now for the release.

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