This deal is only available if you have Quidco account.
What you get is : £2.75 and 300mins+600texts. for FREE
I just found out that Quidco gives us £23.33 for every Sim only ( Simplicity ) deal.
My contract is 150mins +300 text/month for One Month only.
I've been waiting for 3 days and Quidco did track my transaction, so 100% that it will work.
However talking with operator from o2, they say that I have to give them 30 days notice after first 14 days, hence I have to pay for 2 months instead of one as advertised.
Finally , what we get is £23.33 - 2*£9.79 = £2.75 and 300mins+600texts FREE
This is great deal I believe.