SIM7000E expansion shield with Arduin Lenardo

I was using Telstra Normal 3G/4G SIM but it didnt attach services(showed signal strength, SIM ready etc… ). later I was trying to change baud rate in SIM7000 after that It shows that unsupport baud rate through serial reading. then it didnt show any data from the shield in serial reading.
I will test with NB IOT Telstra SIM.
Thank you for the valuable details