I am currently facing an issue where the BSNL SIM card is not being detected by the Quectel EC200U-CN module. The module does not register the SIM on the network, and there is no indication of SIM activity. This behavior is similar to what I previously observed with an older Jio SIM card.
I have confirmed that the BSNL SIM functions correctly in other devices, which suggests the issue may be specific to the module or its configuration. As the EC200U-CN module is expected to support all major Indian networks, I would like to confirm whether there are any known compatibility issues with BSNL, or if any special configuration is required for it to function properly.