webgl and iphone

Is possible to view a webgl web html5 application with iphone?
What are the models of iphone that support webgl ?
What browsers support webgl in iphone?
and how do I turn it on in browsers that support it?

Only for add developers according to http://www.theregister.co.uk/2011/06/16/webgl_in_ios_5/

WebGL will not be publicly available in iOS 5. It will only be available to iAd developers. Chris Marrin, WebKit Engineer

Read the article on http://atnan.com/blog/2011/11/03/enabling-and-using-webgl-on-ios/

You can read about WebGL on iOS in http://artpulse.me/articles/WebGL-on-iOS/

And take a look to the chart available on http://caniuse.com/webgl