Hope this has not been posted already, if so just delete it.
Noticed that Mobileshop.com have an 18 month free deal on an 18 month contract - £540 cashback over the term on o2, 400 anytime mins/100 texts with a Nokia 3120 claim in months 6, 10, 14, 16, 17 and 18.
Go through Quidco for £25.
Small profit to be had if you go through Quidco.
Think you have to pay £0.99 per month for itemised billing.
I have been with this lot before & had no problems with cashback apart from waiting upto 3 moths for my cashback but received it all in the end without having to chase them up.
Hope this is of some help to someone out there?