In store at currys, bought one today,

I went to every phone shop and they were the only shop that gave free credit (£10) with the phone and the phone was not specific to a network (even tho the deal shown was T-Mobile - you get a Nokia specific phone)

I have only seen carphone warehouse at the same price but, they ask for a credit of at least £10 when you pat on your credit/debit card or £20 if you pay by cash