Amzer Silicone Jelly Skin and Holster Combo for HTC Thunderbolt - Frustration-Free Packaging - Black Provides a firm grip and prevents your HTC ThunderBolt ADR6400 from sliding across your cars dashboard or angled surfaces. Its special anti-dust and scratch-free properties, preserves your phones shining look. Fashionable & flexible Amzer Jelly Case for your new HTC ThunderBolt ADR6400! Helps to prevent your device from sliding on soft surfaces or angle surfaces. This elegant skin-tight jelly case is perfectly manufactured to fit.