Normal clamps open to accommodate the 'Width' of the phone not the depth.
I couldn't make it out with this clamp but are you saying it is held by clamping the depth of the phone. If so surely that would mean clamping the back of the phone to the glass front?
I mean come one dude did you even click the link and check it out? Here is how it works ...
Sent from my GT-N7000 using Tapatalk