I'm not entirely sure whether this will just get voted cold since it's not available to everyone, and whether I should just put it in misc instead. Apologies to anyone who dislikes this deal anyway.
I just thought I'd post as I've called up o2 today as I've just finished up my 12 month term that I originally agreed to when I signed up. Noticing that they're offering new customers three months free, I thought I'd call up and see if they'd offer me the same if I was to agree to a new 12 month term (which I'm perfectly happy to, I certainly wasn't looking to get away from them). After being put through to retentions, the lady told me that I had two options- I could have either:
£2.50 off my bill each month for 12 months (bringing my bill on Pro down to £20 a month or £15 with an o2 mobile discount.)
Three months free! (for me, a total saving on Pro of £67.50)
Given that if you leave o2 to rejoin and get quidco, you have to wait at least three months before you can rejoin, I think this is a pretty good deal for those who'd rather not be without for quarter of a year for the sake of £50!
As mentioned, this deal is only of use for customers who have seen out their 12 month term and did not realise they can get some decent offers if they renew their commitment.