This makes sense. Even if you decide to use a contract phone with a different network, you still have the contract and are still – in theory – repaying the subsidy on your new phone. This is not the case with pay-as-you-go burners, which remain locked by Voda and other providers. By selling unlocked contract phones, Vodafone will lose little in terms of revenues, and add-value to their offerings to customers. Win-win.
BTW. I took the kids to the park yesterday and have some video footage from the phone. The thing captures gorgeous video.