Whats the minimum iOS version which supports OpenGL ES2.0?

I am not sure if the question even makes sense. I am writing an iPhone game which uses Opengl ES 2.0. I know that OpenGL ES 2.0 is supported o开发者_如何学JAVAn 3gs and higher. Is there a minimum requirement for iOS version too, like the device needs to have iOS 3.1.3 or higher? Or does it solely depend on the hardware?

Thanks! -shireesh

p.s. I tried to search on the net but havent found much, perhaps I am not using the right keywords

According to the EAGLContext ref, the ES2 API has been available since 3.0. Any device that CAN run ES2 will already be running that OS, (hopefully 4.0)