I was looking for a new mobile and unsure what to get/look for as I don't make many calls/send many texts. I stumbled across this deal on mobiles.co.uk:-http://www.mobiles.co.uk/t-mobile-nokia-5530-clearance.html
£20 per month, 100 mins, 100 texts and [UNLIMITED WEB BROWSING with 16 months cash back by redemption
Obviously if you're someone who uses a mobile a lot then this is not the deal for you - but it's fine for me :p
hope this helps someone!