£100 cashback for a 12 month contract SIM Only. Limited time only.
19.58 = 800 Mins 1600 texts + one bolt on
29.38= 1600 Mins, 3200 texts + one bolt on
The bolt on can be:
-Unlimited o2 to o2 calls
-Unlimited web bolt on
-Unlimited weekend calls
-Unlimited Landline Calls
-200 extra anytime minutes
-Blackberry Bolt On
This is cashback via Quidco http://www.quidco.com/mobile/o2/
If you click this link, it goes to O2, and would invalidate your cashback, as it would leave an O2 cookie on your pc. Go via Qudco directly to avoid this.
If you've yet to sign up to Quidco, then you may be interested in going through TopCashBack.co.uk instead, who are also offering £100 cashback. The reason being Quidco have a £5 a year admin fee in place, whereas TCB is completely free.