Pull the Anti-Clamp's blue handle backward to unlock the arms.

With the screen facing up, slide the arms over the left edge of your phone, with one suction cup on the screen and the other on the back glass. Center the suction cups near the bottom edge.

Support your phone so it rests level while between the Anti-Clamp's arms—a small box works well.

Squeeze the cups together to create suction.

If you find that the surface of your iPhone is too slippery for the Anti-Clamp to hold onto, use tape to create a grippier surface.