public void ChangeSim4G_1(SerialPort sp, int i, DataGridView DTGV_Thongtin, string Seri, Dictionary<string, string> recport, DataGridView DTGV_4G, int j)
		{
			try
			{
				Regex r = new Regex("\\d{9,11}");
				Regex r1 = new Regex(",\"([\\s\\S]*?)\",");
				new Thread(delegate
				{
					try
					{
						bool flag = !sp.IsOpen;
						if (flag)
						{
							sp.Open();
						}
						DTGV_Thongtin.Rows[i].Cells[3].Value = "Đang thực hiện";
						recport[sp.PortName] = "";
						sp.Write("AT+CUSD=1,*098*4# \r");
						Thread.Sleep(5000);
						sp.Write("AT+CUSD=1,2 \r");
						Thread.Sleep(5000);
						sp.Write("AT+CUSD=1," + Seri + "\r");
						Thread.Sleep(5000);
						sp.Write("AT+CUSD=1," + Seri + "\r");
						Thread.Sleep(5000);
						sp.Write("AT+CUSD=1,1 \r");
						Thread.Sleep(5000);
						bool flag2 = recport[sp.PortName].Contains("Quy khach dang su dung sim 4G cua Viettel");
						if (flag2)
						{
							this.Dtgv_Change4G.Rows[i].Cells[2].Value = "Thành công";
							DTGV_Thongtin.Rows[i].Cells[4].Value = r1.Match(recport[sp.PortName]).Groups[1].Value;
						}
						else
						{
							this.Dtgv_Change4G.Rows[i].Cells[2].Value = "Thất bại";
							DTGV_Thongtin.Rows[i].Cells[4].Value = " Vui lòng thử lại";
						}
					}
					catch
					{
					}
				})
				{
					IsBackground = true
				}.Start();
			}
			catch
			{
			}
		}