A large white box was delivered to the CEOs of Vodafone’s key corporate prospects. On the outside was the headline: Set your workforce free.Inside was a hand-made wooden birdcage. Inside the birdcage was a USB key modem. Plugged into any laptop, it gave instant mobile access to the Internet. The accompanying booklet gave simple instructions for use and details of a month long free trial.This impressive execution demonstrates the freedom that the mobile internet brings to large companies. Just one contract with a company of this size would pay for the investment in the creative many times over.