Ever since we landed in London, we've had nothing but problems with the clay international sim. I had paid for unlimited internet plan but that never worked not even for a second outside the wifi network. Called their customer centre, was on hold for over 25 mins. Asked the staff to help us with this issue, and they directed the call for another 15 mins and ultimately said it's not in their hands. I mean what's the point for spending so much for a service that doesn't even work. Not at all good.