yeah, I know Volume rocker is for volume , and it doesn't have to be 2 stage, just to take the picture, I saw it in Samsung Note 4 with one of my friends, it is big as one handed user to take a picture , that solution is alternative but not like the actual 2 stage button , but at least better than having to hold the mobile with one hand and take picture with the other , using L.930 for long time, when i wanted to take picture using the samsung device i felt paralyzed, i guess same case of lumia 640 xl for example with its big screen !!