The VoIP provider's service uses the Session Initiation Protocol (SIP) the major open standard utilized by most major mobile phone service providers.
Because of this a Tpad User in America, for example, can initiate a free call using their mobile phone to Europe or Asia using the service.
Chris Morris, Tpad General Manager, states: "At Tpad we give you a free personal SIP phone number that you can use to make and receive calls. You just simply dial the SIP number of your friend anywhere in the world and the call is totally free. For instance, I can call my friend in Spain for free from my mobile when I am in a WiFi Hotspot by just dialling his seven digit Tpad number."
Tpad's service allows free calls to be made using any SIP Device (WiFi Mobile/ATA/IP Phone) whereas most existing mobile phone VoIP methods are either expensive or difficult to set up.
For example, Skype's new 3 Skypephone uses a non-SIP proprietary architecture that can't be used to call to SIP users.
Likewise Apple's iPhone, which has a WiFi connection, is not SIP enabled preventing users from making free or low cost international calls.
"The main advantage of SIP is that it works easily with other applications,"
The Tpad service is currently available on any Wi-Fi mobile phone that has a built-in SIP client, currently all Nokia N and E-Series phones support this.
It is expected that as more dual-mode (standard mobile phone service and Wi-Fi) phones reach consumers by the end of the year the interest in the service will grow.
Leading mobile phone producers such as Samsung and Motorola will soon be releasing brand new phones that are compatible with the SIP protocol.
Tpad has recently added detailed step-by-step SIP guides to their website to help make the service as accessible as possible for even the most novice user.
The guides demonstrate the process of quickly setting up your mobile / SIP device with the Tpad Global VoIP Network.
"We want to make the whole process as easy as possible in order to reach all types of customers. It is our aim to be the first choice VoIP provider for mobile users who wish to make VoIP calls. Shortly we will be sending an SMS text to our customers that will automatically setup their phone with their personal Tpad settings," Morris continued.
