This is my current mobile, I know there are newer models but if you want a decent phone with free line rental on a good tariff this deal is for you. Cool New Mobile is part of Phones4U and there aren't any dodgy cash back T&Cs, they seem pretty straight forward.
12 months FREE line rental on a 12 month contract - Equivalent after cashback + 3 months double talk & text. Video talk and text 700.
You can also earn £35 through Quidco.