Well you can lie down the phone on the grill without the camera lenses getting covered. Then you build some kinds of pillars (anything; I just used 2 stacks of

Well you can lie down the phone on the grill without the camera lenses getting covered. Then you build some kinds of pillars (anything; I just used 2 stacks of books on each side) and put the grill with the phone on top. Then with one hand I released the trigger and with the other hand I turned the pages. It worked surprisingly well.