Cyan vs GDR1A Reddit user has posted some screenshots from his two devices one of which runs Lumia Cyan and another runs Windows Phone 8.1 update 1.

Seems GDR1 brings new icons for Photos, Camera and FM Radio as can be seen in the above image. Screenshots from Lumia Cyan are on left, while those from Windows Phone 8.1 update 1 are on right. It also seems that these new icons are similar to those seen on Windows Phone 7.

You can read all Windows Phone update 1 details and hands-on demo at our dedicated GDR1 page