After Lumia 930, it seems like turn of Samsung Ativ S to receive Windows Phone 8.1 update 1. As per the reports all the Ativ S devices ( without dev preview) are receiving the update now. It brings some new Radio drivers, which means it includes firmware update from Samsung too.
The OS version is the same latest version, we have running on our dev preview running devices and which fixed update errors and brought GDR1 to HTC devices.
You can read all about Windows Phone 8.1 update 1 at our dedicated page.