I need help with my ec21a modem pool none of the drivers are working

Technical Subjects Driver
23

In this case, in my experience, it could be caused by the sim card . Have you tried switching to another SIM card? Is the antenna not connected?

I can send you a tool to catch the log, but I can’t help you analyze the modem log in the forum. Therefore, it may still be necessary to submit case to Quectel.

24

I’ve tried 5 different sim cards.

I’ve tried two different manufacturers of SIM cards.
Both with same results.

Antenna is connected.

Yes please. The tool would be most helpful.
Ok. I understand it may be necessary to submit case to Quectel.

25

On Windows，you can use the QWinLog to cache the modem log.
I will send it by message.
Steps are:

  1. Open and run QWinLog, select DM Port, please refer to the attachment I provided for details;
  2. AT+CFUN=0
  3. AT+CFUN=1
  4. wait for 3 minutes.
  5. Run AT+CFUN=0 and AT+CFUN=1 again
  6. Wait for 3 minutes.
  7. Close the QWinLog
26

Thank you sir.

DM port?
What is that?

I will update

27

If it is an individual SIM card, the SIM card may be bound to the IMEI of other devices.

Please create a ticket to the Quectel.
An engineer is automatically assigned to check the log for you.

This topic is in the Driver subjects.