Q: What is VoIPover3G? A: It is an application that let your iPhone think it has an Wifi connection while in reality it just has 3G, GPRS , Edge connection. Q: Why should I need that for? A: Some applications requires a WiFi connection to work. For example with Fring [App Store link], you can only form voice calls via Skype or SIP, whether there is WiFi. Technically, Fring itself does not need that.

Orginal post by Waku_Waku