Albert Einstein Famous Insanity Quote with Gray Background 2-Piece Dual Layer High Impact Black Silicone Cell Phone Case Cover iPhone 4 4s Designs will be printed directly onto the metal part on the back of the case via latest sublimation technology. THIS IS NOT A DECAL OR SKIN MODEL COMPATIBILITY: Fits T-Mobile, AT&T,Verizon, Sprint ACCESS: Full access to all functions (buttons, ports, front and rear camera, and flash) MATERIAL: 2 Piece Dual Layer High Impact Black Silicone