Great deal on mobiles.co.uk for a cashback mobile phone contract. Various options but the best if you've plumped (or are thinking about) one of the recent smartphone PAYG deals is 18 months on Vodafone with 600 mins, unlimited texts, mobile internet and Vodafone Passport which works out as £40/month upfront but you can get 17months(!!!) back via redepmtion.
This works out as £40 for the whole of the 18 months (£2.22 per month) and you can even email the claims off or send them off online so no need for any recorded delivery costs either...seems like an utter bargain. This one is called Vodafone "Your plan 600 + mobile internet".
If you'd prefer to get something up front rather than run the potential risk of cashback claims then you can plump for £340 auto cashback (or PS3/Xbox elite/Sony Vaio etc)instead of the cashback altough these are nowhere near as good value.
You do get a phone chucked in as well - the Nokia 1661 - but that's just a token gesture on the phone contract really which is the crux of this deal.
There are also a couple of options at 11 months free on12 month contracts (300 mins + Unlim texts for £35 total after cashback, or 900 mins + Unlim texts for £45 total after cashback for 12 months, or 900 mins + Unlim texts + Mobile internet & Passport for £50 for 12 months total after cashback)
Note that there is also £50 cashback for new phone contracts via either Quidco or Topcashback for mobiles.co.uk - effectively this could mean you're being paid to take out these contracts!