Are this VR headsets only working with the new samsung phones or are other smartphones also supported.
Any Android and iOS smartphones are supported. For best VR experience, the phone shou;d have gyro sensor.
Seen these around, what is the quality like? It must be like minecraft quality graphics or can you see other stuff like text?
The quality is best ! It just depends on the quality of the video you are watching or the graphics of the app. The viewer has nothing to do with the quality.