In one of the previous posts I presented a powerful solution of Web Activated Telephony with cost control using a service from VoXaLot (a Jajah for advanced users).
Looking recently on VoXaLot site I note that they enhanced the Web activated telephony service to allow VoIP calls to be initiated from a mobile phone. To do this you must set-up the Web Callback Phone Book and then using your mobile phone go to:
A data plan is required for this. Since the connection is used only for activating the call, a GPRS connection is more than enough. The service is perfect for using those SIP providers that offer grate rates with certain destinations but don’t provide PSTN access numbers.