Electronics giants who want to compete for retail attention but can't always justify a full presence have a common trick: open a mini store. Apple did it, Microsoft did it, and Samsung virtually based the Galaxy S III launch on it. HTC is next at bat. While it has its own stores in Asia and parts of Europe, the smartphone designer is trying out a store-within-a-store at the giant Saturn-Markt shop in Hamburg, Germany. Swing by and you can buy or test
