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

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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)