Hong Kong-based iPhone case maker Musubo has released two distinctive designs for the iPhone 5: Hypergrip ($30) and Retro ($35). The former is a simple silicone rubber case with a contrast-colored hard plastic bar running diagonally across the back, matching a grippy molded pattern above and below it; the latter is a two-layer rubber case and hard plastic frame design, similar in looks to a classic microphone. Retro looks and feels considerably moreā¦