Angry Skull Protector Case for Samsung Galaxy Prevail 2 / Galaxy Ring M840 Form-fitting front and back hard shell snap-on covers. Protects your phone from bumps and scratches. Openings for buttons and ports. Allows access to all functions; Easy snap-on installation; no disassembly is needed. Compatible with: Samsung Galaxy Prevail 2 (Boost Mobile) SPH-M840 / Samsung Galaxy Ring (Virgin Mobile) SPH-M840