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Roaming sim card on EHS6 | Thales IoT Developer Community

February 27, 2017 - 12:23pm, 5580 views

Hi,

I am using a roaming SIM card on EHS6 module and facing some difficulties when selecting network operator. 

1, I sometimes experience switching of network operators. The module sometimes stays on a network for a few seconds and then switches to another network.

2, When disconnection happens, I send AT+COPS=0 but receive error: "operation temporary not allowed" or no response from module. I wait for 5 minutes but still no response, so I send some random character and the operation was aborted.

3, I try sending AT+COPS=2 to deregister, then send AT+COPS=0 to test and the above mentioned happens.

I saw this thread https://iot-developer.thalesgroup.com/threads/ph8-network-selection-roam...

Probably I am facing the same problem?

I am wondering if probably there are cases where AT+COPS=0 is not supposed to be used?

 Regards

Thu Hang