Ringful's sms2call service lets you to text in phone numbers (or Ringful Alias), and the service will connect you for free. It works well for International numbers. It is ideal for highly mobile international callers who do not want to deal with the complexity and limitation of calling cards or VoIP services.

The ###### is the phone number or alias you wish to call. Your phone will ring first, once you pick up, your friend's phone will ring, and then you can talk. The phone number must be in all digits. Obviously, for international calls, the phone number must have country code (e.g., 18004664411 for a US number, and 862887571234 for a Chinese number).

You can append more than one numbers and alias after ring to setup a conference call (you can have up to 9-way conference). All your phones will ring at the same time. When you pick up, you will be able to speak with whoever picks up to join the conference.