It wouldn't be like the Homer car, it's my calling
For a start I'd basically just take the iPhone 4, remove all the plastic, maybe replace the glass with sapphire to make it more durable, and add a way to pop the back off for battery removal and camera/mic/speaker switches (maybe others)
Then I'd make the OS open source and fix any misleading/confusing phrasing in the UI. 99% of my career as a designer would be spent fighting over how stuff should be phrased
If the OS ever stops needing help, then I might design a Homer car phone with an OLED screen on one side and e ink on the other side and an optional built in joint/blunt lighter and 2 full size USB ports and a full size HDMI port and 4 headphone jacks that can also handle power and data transfer iPod Shuffle style




