Pull the display screen up and completely off the iPhone 5s body
The next step is to pull the display screen up and completely off the iPhone 5s body.
When the glass screen starts to come away from the plastic holder (as shown) carefully slide a plastic opening tool between the plastic frame and the body of the iPhone 5s to ease the metal clips out of the case.
Just above the home button, push a suction cup firmly onto the screen, making sure that the cup has a very tight seal.
If your screen is totally smashed on your iPhone, as mentioned above, it helps to cover the screen with adhesive tape, such as packing tape, as this will give the suction cup a flat surface to hold and also stop the spread of broken glass.