SIPPhone On iPhone, All You Need Is A SIP Account

http://snapvoip.blogspot.com/
I noticed today on iTunes App Store, SipPhone on iPhone . After digging a bit deeper I found this application,SipPhone on iPhone is using WiFi connection on your iPhone or iPod Touch and turns your iPhone or iTouch into a mobile VOIP phone. You can make cheap or free phone calls (local or long distance) over the internet at anytime, and from almost anywhere.
All you need is a free SIP Account or Paid SIP Account. All calls connect directly to the SIP provider, avoiding proxies as such avoiding voice delays and providing excellent call quality.

Following are the Key Features as per developer Vnet corp:

• Support SIP protocol
• Support speaker phone
• Voice mail notification
• Multiple ringtone selection
• Support DTMF tone (RFC2833/Inband) during the call
• Support G711 and GSM codec
• Support using alternative RTP port
• Support Stun for NAT Traversing
• Support Sip Proxy
• Capability of mute/hold call
• Support multiple SIP accounts
• Dial directly from iPhone's address book
• Support prefix dialing when make call from address book
• Redial from recent call list
• Shortcut to make regular celluar call

Tags: Vnet corp, SipPhone on iPhone, Free SIP Accounts, iPod Touch VoIP