The HiHiTalk dialer is a free VoIP dialer supports IDD calls and lets you call yous friends directly with a free VoIP account. It utillize WiFi if available and connected or can use the mobile phone service when there is no WiFi available. Compatible with iPhone 3G, 3GS, 4, 4S and iPad running iOS v4.0 or later.
Summary of Features
No service subscription is required to make calls with your friend