This is video demo for fonme.
FonMe provides unlimited free calls and texts to any phone number. FonMe allows you to make free calls and send free SMS from your Android smartphone almost anywhere worldwide.
FonMe uses the SIP protocol and the RTP technology. This is the most standard technology to have free calls. As such, it is better that other services like Viber, Skype or Tango. Even the SMS technology used by FonMe is better to exchange simple text messages.