Clay sims are total waste --- my friend had asked me to use an international sim from clay, saying that they have really good services and I wudnt have any issues. Taking his word I bought a clay sim for London. Nothing worked ever since I put that sim in my phone. I couldn't even connect to their toll free number to lodge my complaint. To do so I had to borrow a phone and as embarrassing it cud get, the toll free number wasn't free. I think clay sims have the worst service in all ways.