Possible £5 cash back if you order a free ee SIM card through quidco. I suspect people will tell me quick enough how good or bad this is. I've ordered so no harm in trying.
It does state connecting to network but doesn't say you have to top up or anything so could just be putting it in a phone. The quidco tracked and doesn't mean it will pay but still tracked pretty quickly.
Note - this is a 4G sim