We are facing an issue with the Quectel EC200U where SMS sending fails when using a Reliance Jio SIM card.
The same hardware and firmware setup is able to send SMS successfully using other operators (e.g., Airtel / BSNL), but consistently fails with Jio SIM.
Dear customer
I have sent you a new firmware via email. Please test it.
Dear @Felix.feng-Q,
JIO sim is not getting registered with this firmware. For your reference I’m attaching a screenshot. Same is working with V04 QPY version from quectel download center
Could you please confirm this by referring to the steps below?
Send the following AT commands.
ATI
AT+GSN
AT+CPIN?
AT+CREG?
AT+CGREG?
AT+CEREG?
AT+QCSQ
AT+QENG=“servingcell”
AT+CGDCONT?
Dear @Felix.feng-Q,
It worked after I forced the network mode to LTE only. Before that, the module was not registering on the network. I’m not sure whether this is the intended behavior but thank you once again for your support.
One more observation: with this firmware, when I insert a BSNL SIM, the module keeps rebooting every 40–60 seconds. Do you have any idea what could be causing this?
Dear Customer
As far as I know, JIO only supports 4G-only mode. You may check with the operator. If set to 4G-only, the module can register on the LTE network.
Regarding the reboot issue, I suggest you use Power.powerOnReason to check the cause.
Please refer to the link below for usage instructions.
