bool Is_Multi_PART = SmartMessageDecoder.IsPartOfConcatMessage(SMSPDU);

DecodedShortMessage[] messages = comm.ReadMessages(PhoneMessageStatus.All, storage);
            foreach (DecodedShortMessage message in messages)
            {
                GsmComm.PduConverter.SmsDeliverPdu SMSPDU;
                SMSPDU = (GsmComm.PduConverter.SmsDeliverPdu)message.Data;
                bool Is_Multi_PART = SmartMessageDecoder.IsPartOfConcatMessage(SMSPDU);
                byte[] element1 = message.Data.UserData;
                if (element1[0] == 5)
                {
                    byte[] numArray = new byte[2];
                    numArray[0] = element1[3];
                    numArray[1] = element1[2];
                    int referenceNumber = BitConverter.ToUInt16(numArray, 0);
                    int totalMessages = element1[4];
                    int currentNumber = element1[5];
                }
            }

List<string> messagesList = new List<messageList>();
                        List<SmsPdu> multiPartMsg = new List<SmsPdu>();


                        foreach (var i in modem.ReadMessages(PhoneMessageStatus.All, PhoneStorageType.Phone))
                        {
                            string msg;

                            if (SmartMessageDecoder.IsPartOfConcatMessage(((SmsDeliverPdu)i.Data)))
                            {

                                multiPartMsg.Add(i.Data);
                                try
                                {
                                    if (SmartMessageDecoder.AreAllConcatPartsPresent(multiPartMsg))
                                    {

                                        msg= SmartMessageDecoder.CombineConcatMessageText(multiPartMsg);
                                        messagesList.Add(msg);
                                        multiPartMsg.Clear();


                                    }
                                }
                                catch (Exception ex) {}


                            }
                            else
                            {
                                msg = ((SmsDeliverPdu)i.Data).UserDataText;
                                messagesList.Add(msg);

                            }
                        }