Yes, I did it. Said NO.When it asks if you want to disconnect and save the data counters, click "NO".
Your MDMA closed and Internet connection is still on.
Opened COM9 in putty
As I see, the above is binary data for signal quality, cell id ?
I can AT COM9
Tried to send USSD in AT , no success but can see, ported started to work
for AT commands.
COM8 is still not active under putty.
But I assume, AT commands can be sent from a script some way.