looks like they have updated the invoices with their IMEI numbers too

I actually had no idea any discount codes existed for this, I paid the full £508.99 for the phone, and plan on buying a vodafone 30 day contract sim for £20 per month with unlimited internet until Nokia deliver the patch needed for this phone to run Three sim cards. My Three plan includes internet, 600 mix n match minutes for £7.50 per month.

I've worked out the total cost of ownership this way would work out less than buying it on contract, plus I'm not tied to any contract.