We begin two weeks in UK a short walk NE of the Marble Arch tube station. Both of us have quad band phones (iPhone5 and Android) that are unlocked. We want UK phone numbers to make calls in London, York, and Edinburgh. For things like inquiries, reservations and to find each other when we get separated. Also want data for web sites and Google Maps (when we're both lost!) It appears from web sites that both CarPhoneWarehouse and Phones4u offer PAYG SIMS and have outlets within a 10min walk of our hotel. The cost for a PAYG SIM for two weeks use appears to be no more than 15-20GBP.
I am surprised by the dismal on-line reviews of both companies. Surely so many people in the forums would not be recommending them both if they don't provide reasonable service? Does anyone have recent personal experience with either of these shops? Ordinarily, my buying style is "put it in my phone and show me that it works, THEN I give you money" , and if a particular shop doesn't "feel right", just walk out and go somewhere else.
My assumption is that all the major UK networks have ample coverage in London, York, and Edinburgh, and that the shop will recommend which PAYG offers what we need at the most reasonable cost.
This forum has contributors who really know stuff, and the suggestions so far have already improved our travel plan.