I am using a EG95-EX module with the firmware revision EG95EXGAR10A04M1G.
I change the network mode configuration to search only for the 4G network.
Then I set the Operator selection mode to automatic.
These commands are sent in this particular order:
If I query the network mode configuration with ’ AT+QCFG=“nwscanmode” ’ , I get nwscanmode, 0 (automatic).
Why does AT+COPS=0 modify the network mode configuration?
Hi @JimmyMars
The 0 for AT+COPS=0 is auto mode, so if you modify it and then use AT+COPS=0 it will revert to auto mode.
My reading of 3GPP 27.007 (section 7.3) is that “Automatic mode” should refer to the network operator, and not to the Access Technology.
Quoting:
Set command forces an attempt to select and register to the GSM/UMTS/EPS/5GS network operator using the SIM/USIM card installed in the currently selected card slot. <mode> is used to select whether the selection is done automatically by the MT or is forced by this command to operator <oper>
So it has always puzzled me that AT+COPS=0 also sets the RAT mode to automatic on Quectels.
I should have mentioned that you can specify the RAT as part of the +COPS command, as we do in the ROOter project as a work-around.
Eg, for LTE: AT+COPS=0,,,7
