Step 1: IPhone 4/4S bumper case. Step 1.
Step 2: IPhone Bumper Case. Steps 2-6
Step 3- Open a new part
Step 4- Open a sketch on the front plane
Step 5- Sketch a corner rectangle on the plane
Step 6- Smart Dimension your rectangle to 4.6 inches tall
Step 3: IPhone Bumper Case. Steps 7-12
Step 8- Fillet the 4 main corner of the iPhone to a radius of 0.2 inches
Step 9- Make a shell in the center of the rectangle to be about 4.2 inches from top to bottom
Step 10- Then, make another shell on top left side of the case, to be about 1.2 inches. (picture on next page)
Step 11- On the top of your iPhone bumper make a shell to be about 1.75 inches (picture on page 5)
Step 12- Repeat step 11 except on the bottom part of your bumper.