SIM Only contracts are getting cheaper and even popular as people keep their existing phones for longer.
For just £10 per month it's possible to get unlimited minutes, unlimited texts and 8GB of data per month on Vodafone. This is a cashback deal - You initially pay £17 per month to Vodafone but claim £84 from the retailer e2save (part of the Carphone Warehouse group of companies).
e2save are also selling another Vodafone SIM Only contract with unlimited minutes and text along with 20GB of data for £12 per month. Again, this is a cashback offer - You initially pay £20 per month to Vodafone and claim £96 from e2save.