(http://i54.tinypic.com/2hem1oo.jpg)
Considering it less uncomfortable than other methods of sneaking cellphones into prisons, a Brazilian gang hired a local teenager to launch phones over prison walls with a bow and arrow. Their plot was foiled when one hit a guard:
Authorities say the boy was caught after one of the arrows he launched struck a police officer on the back. The officer was not seriously injured because the cell phone was tied to the tip of the arrow and softened the impact.
Oh good. The teen did manage to successfully fire off four arrow-phones before that, though, so all in all maybe this plan was not as stupid as it sounds.