Looks like a very basic phone but great deal for the minutes + texts.
Contract is Orange Dolphin 30 with £10/month Discount for 18 months = £20 / month payable to Orange for 400 Xnet anytime minutes & 'unlimited' texts.
14 months free via redemption offered from mobiles.co.uk (redeemable after months 6, 9, 12, 15 & 18, and you have a 30 day period to send them the bill with cashback voucher etc.
On top of all that there's £40 offered by Quidco making it just £2.22/month over the period of the contract - Bargain!
I've never used mobiles.co.uk for chequeback redemption before, but I have successfully used redemption deals before with well known retailers, and they work well IF you are organised and only sign up if you are well informed.
See first few posts in http://www.hotukdeals.com/item/411235/sony-ericsson-t280i-free-with-16-mo/
for a thorough assessment of Chequeback deals