Quote: "I would have thought OGL2.0 was pretty standard these days?"
Not necessarily, some older devices may only of OGL 1.0, and even older ones might not have OGL at all.
And not everyone keeps everything completely up to date.
There is an app for Android named GLESView or GLView (the app name says one thing and the icon another). Search for 'OpenGL Extensions Viewer' in Google Play. It will tell you if OGL is installed, the version and what extensions are supported.
Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master