EG915U-EU : cannot make a call to the device when using 4G SIM

Hi,

Using a 2G Sim (Orange operator, in France), I succeeded calling the EG915U module (I saw the “RING” pin changing).

But with a 4G SIM (also Orange operator), the “RING” pin does not change (neither after AT+QCFG=“nwscanmode”,1,1 nor after AT+QCFG=“nwscanmode”,3,1) .

Nevertheless,

  • Putting the 4G SIM in a phone, I can call it : the phone rings.
  • From the EG915U module, using this 4G SIM, I can send data using GPRS ; I can also send SMS.

Module firmware is: EG915UEUABR02A04M08

Any idea ?
Thanks.

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