The new VoxOx Call iPhone app for Call Connect, SMS, and Fax utilizes our callback functionality for cheap mobile calls and international calling. Call any phone, worldwide using your iPhone address book and pay only pennies per minute. All without using your data plan. You can even send and receive SMS messages worldwide - it's free to receive, and only one to two pennies to send. Email copies of your SMS transcripts for free.
iPhone OS 4.x