Hello, we have a project using EC200U-AU here in Brazil which will use two SIM cards. In the prototype we’re using a Telecom Italia (TIM) and a Claro S.A. SIM, the TIM chip is in the 1st SIM interface and the Claro in the second one. When we enable the DSSS mode of the modem (AT+QDSIMCFG=“dsss”,1), reset it, and then switch to the Claro chip(AT+QDSIM=1), the modem still remains registered in the TIM network, even though the AT+QDSIM=1 command returned OK. Here’s the command sequence used:
AT+QDSIMCFG=“dsss”,1
AT+QDSIMCFG=“dsss”,1
OK
AT+QDSIM?
AT+QDSIM?
+QDSIM: 0
OK
AT+QDSIM=1
AT+QDSIM=1
OK
AT+CREG?
AT+CREG?
+CREG: 0,1
OK
AT+COPS?
AT+COPS?
+COPS: 1,2,“72404”,7
OK
72404 is the code of TIM group, Claro S.A. is 72405… When forcing to register on Claro we get the following:
AT+COPS=1,2,“72405”,7
AT+COPS=1,2,“72405”,7
+CME ERROR: Network not allowed emergency calls only
even though Claro network is available:
AT+COPS=?
AT+COPS=?
+COPS: (2,“TIMBRASIL”,“TIMBRASIL”,“72404”,7),(1,“72499”,“72499”,“72499”,7),(1,“VIVO”,“VIVO”,“72406”,7),(1,“Claro”,“Claro”,“72405”,7),(0-4),(0-2)
OK
Is there an additional procedure for registering the second SIM card?
Thanks in advance.