We are professional manufacturer and exporter from China, specializing in the phone test card (test SIM card). We have profuse products including GSM, CDMA, WCDMA, TDCDMA, etc. with high quality, and expressly, our price is very competitive because we are manufactory, we are the source. You are welcome to visit our website on http://www.smartcardb2b.net which includes our company profiles, history and something latest products.