>> http://shop.tescomobile.com/mobile-phones/pay-as-you-go#price-min=0&price-max=1000&sort-by=phone-price-low >> >> (* for those unfamiliar with the UK, Tesco is the largest supermarket chain) > >This should be just fine. Any chance that there is a Tesco at Heathrow? Nope, just the SIM vending machines near the exits from customs, the SIM Local store in Terminal 1, and the Vodafone store in Terminal 5. For what you want, any SIM should work OK. Remember that incoming calls are paid by the caller (not really "free"), so the only difference is the outgoing cost. I doubt you will make �10 of calls during the week no matter what carrier or plan you have. I've never seen them more than 20p/min, so that's at least 50 min of outgoing calls. R's, John