Instructions:I managed to get this via online live help, they could not give me the htc hero on 18 month contract with 500 x net and free texts and internet , for £25. , only 24 months, so softened the blow by giving me this promo voucher, hope it works for you.
The voucher will be in your basket after updating the cart with this code. it will arrive with your new contract phone.
Use at :- http://www.threeaccessories.co.uk/choose_phone.php