Just bought this to use on the hot deal that was floating around earlier in the month (the Play.com d900i for £49.99).
The phone was Vodafone Live! branded and locked so I used this piece of kit to debrand it and unlock it.
It works like a treat but I don't need it anymore as it's done its job!
Royal Mail Recorded Delivery (someone will need to be home to sign) and I accpet cheques/postal orders or direct bank transfer.