Sharing ur details with clay sims will be biggest blunder you could make--- they charged my card three times in a row with different amounts under different sims.. While I had just used the sim for US and had also cleared my bill. On inquiring this fraud, their manager said it was a mistake that the system did and they would refund the money. And now am writing to them over and over again for a refund. It became a headache to use clay sims, really and I am still paying for that.