Wanna channel your inner 1980s yuppie?
If you've got an iPhone 4 or 4S and a 3D printer, it's easy to feed that hankering for the charm of a clunky old brick phone with this upgrade (retrograde?).
This design produces four pieces that snap together to turn your cellphone back a few decades, complete with belt clip. It’s free and it's Creative Commons licensed, to boot.