iPhoneSIMfree is being distributed by four different online vendors in different regions of this world. iPhoneSIMfree is iPhone unlocking software which removes the restriction to use iPhone only with AT&T in US.
The four vendors reported by Engadget are Wireless Imports in the US, iPhoneWorldwideUnlock in Australia, 1digitalphone in Germany, and iPhone4arab in Saudi Arabia. They all are reported to have purchased bulk licenses from iPhoneSIMfree team and are selling them at different prices in different countries. For example, in US, iPhoneSIMfree is being sold at $99 whereas the cheapest comes from Australia – $50.