A new study from Juniper Research reckons there'll be over 100 million mobile VoIP users by 2012, with more than half of them living in North America and Europe.
The company says mobile VoIP services will develop significantly faster in developed markets as a result of 3G roll-outs - even though mVoIP traffic may eventually be higher in developing markets – and despite a high percentage of mobile VoIP being carried via WiFi networks.
Anthony Cox, Senior Analyst at Juniper Research, said "By 2012 we expect significant uptake of mobile VoIP in its various different flavours. By that date mobile VoIP will be available over both 3G and WiFi networks. We also anticipate that several more traditional operators will have joined 3UK and Verizon in the US and developed relationships with mobile VoIP players such as Skype."