It is possible to make free VoIP calls through the services of softwares like Skype, Yahoo Messenger, Google Talk and Live Messenger which provide chatting facilities.  As far as free VoIP calls are concerned, the services of Skype is considered one of the best as it enables free computer-to-computer VoIP calls although it charges for a computer to phone or a phone to phone call.

One drawback of free VoIP calls is that there may be disturbances during the call which can be attributed to the quality of the hardware installed or the type of connection.

For making free VoIP calls through internet both the parties have to sign up with any instant messenger service, add each other in their contact lists and then accept each other as a contact.  Finally, they can text chat or voice chat with each other through the internet by clicking on the names.

Each service provider have their own call charges for PC to phone and phone to phone VoIP calls and one can choose the best suited for him among them.  Internet is the best medium for making this choice.  One can also get the list of free VoIP softwares by searching in the search engine.  As they are free, he can install all the VoIP service softwares and then choose the best among them.

For making calls you need to download a softphone widget. You need to enter the number in an international format to make calls. QtTel operates in a very simple way it first calls you then it calls the destination number. Though it seems to be a good catch for making free VoIP calls, These free VoIP calls are only limited to a maximum of 5 countries only. Also another small demerit is that a calls is connected for only 5 minutes. But yes you can dial the number again and again.

Below is the list of 5 countries where you can make free VoIP calls.
Australia— (FIX only)
Canada— (FIX & GSM)
UK— (FIX only)
Holland— (FIX only)
USA— (FIX & GSM).

Please give your feedback if you have been using QtTel Services.