I know this is a 24 month contract but the deal works out at £15 a month after £120 cash back. I know the CB isn't guaranteed but Quidco have been really reliable for me recently.
This won't be a good deal for most people but hopefully someone will find my post useful.
Please read the important Quidco information below if you are going to place an order:
Please note that your cashback on pay monthly contracts will be subject to a two-month validation period from connection. No cashback will be paid on upgrades or on cancelled / unsuccessful connections. Cashback is paid per basket, not per phone. Cashback is not paid on reconditioned PAYG phones or accessories. Cashback is not paid on iPhones.