AT command band setting

How does the AT command to set the frequency band work? I want to set LTE lte band 40 ? AT+QCFG=“band”[,,].
And AT+QCFG=“BAND” +QCFG: “band”,0xd3,0x1e200000095 represent what band of LTE now?
Thanks! I’m using EC20.
AT+CGSN
869218064149394
AT+CGMR
EC200ACNDAR01A11M16
And I would like to know that this EC module can only be used to access the fixed commercial carriers, such as Telecom, Unicom, Mobile, Radio and Television? Can it be connected to a base station like srsRAN?
Thank you!

AT
OK
AT
+CPIN:READY

+QUSIM:1

+CPIN:NOT READY

This is what it shows when I insert the pc after inserting the USIM card in this module, why does it appear that CPIN first READY and then immediately NOT READY?I don’t think there is a wrong location for my USIM card.
Thanks!!!!

AT+QCFG="band",0,8000000000

`B1+B3+B5+B8+B34+B38+B39+B40+B41

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Thank you very much!!!!