-Magic-sculpt resin and hardener ($26)
-nail polish (2x$4)
-x-acto knife ($3?)
-cell phone (70?)
For me the project used tiny amounts of supplies I already had. I think you could pull this off with polymer clay, E6000, and nail polish.
-cell phone lanyard
-cell phone charm
I think this would look great a lot of ways- I kind of wanted to do a panda but I actually already did a resin/nail polish panda for a thumb drive. Besides, the cyclops thing suggested by the RAZR screen lent itself well to the monster thing. But this would make an amazing cow. Ooh, also, coordinated wallpaper would be cool.
-your phone is going to be beyond ruined, warranties voided, and depending on how attentive you are you might cement bits off that needed to be functioning. (Does that put you off? Then the Hime/Princess fashion subculture girls are ballsier than you. :) )
-nail polish fumes are terrible, and there are a lot of them here. (see parenthetical taunt above)
-honestly, this phone is heavy enough that my wrist gets tired holding it up to text.
Step 1: Applying Resin
Step 2: Painting
Note: I forgot to put the horns on with the rest of the resin, so I had to slice off the polish where I wanted them and then form them. I think this is a weaker bond, but luckily these are for show and not, you know, combat.