Windows Phone 7 SIM卡資訊獲取

    public class SIM
    {
        #region 平臺呼叫
        [DllImport("cellcore.dll")]
        public extern static int SimInitialize(int dwFlags, IntPtr lpfnCallback, int dwParam, ref IntPtr lphSim);

        [DllImport("cellcore.dll")]

        public extern static int SimDeinitialize(IntPtr hSim);

        [DllImport("cellcore.dll")]
        public extern static int SimReadRecord(IntPtr hSim, int dwAddress, int dwRecordType, int dwIndex, byte[] lpData, int dwBufferSize, ref int dwSize);

        int EF_ICCID = 0x2fe2;
        int SIM_RECORDTYPE_TRANSPARENT = 1;
        #endregion



        //返回Sim卡背面的20位ICCID 
        public string SimSerialNumber()
        {
            IntPtr hSim = default(IntPtr);
            byte[] iccid = new byte[10];
            int dwsize = 0;
            SimInitialize(0, IntPtr.Zero, 0, ref hSim);
            SimReadRecord(hSim, EF_ICCID, SIM_RECORDTYPE_TRANSPARENT, 0, iccid, iccid.Length, ref dwsize);//在這裡獲取了SIM卡ID
            SimDeinitialize(hSim);
            return FormatAsSimString(iccid);
        }

        /// <summary>
        /// 對SIM卡ID進行格式化
        /// </summary>
        /// <param name="iccid">byte格式的ID</param>
        /// <returns>字串格式</returns>
        private static string FormatAsSimString(byte[] iccid)
        {
            string rawString = GetRawIccIDString(iccid);
            return String.Format("{0} {1} {2} {3}", rawString.Substring(0, 6), rawString.Substring(6, 5), rawString.Substring(11, 4), rawString.Substring(15, 4));
        }

        /// <summary>
        /// 格式轉換函式
        /// </summary>
        /// <param name="iccid"></param>
        /// <returns></returns>
        private static string GetRawIccIDString(byte[] iccid)
        {
            System.Text.StringBuilder builder = new System.Text.StringBuilder();
            int i = 0;
            while (i < iccid.Length)
            {
                byte b = iccid;
                builder.Append(ConvertInt4PairToString(b));
                Math.Max(System.Threading.Interlocked.Increment(ref i), i - 1);
            }
            return builder.ToString();
        }

        private static string ConvertInt4PairToString(byte byteValue)
        {
            return ((byte)(byteValue << 4) | (byteValue >> 4)).ToString("x2");
        }
    }