Hi,
You can try using AT!UIMS command to switch to other SIM with some AT commands as below.
Please make sure the APN and frequency band are corrected with each SIM card to connect cellular network.
I have attached the log file for your reference.UIMS.txt (4.9 KB)
AT!ENTERCND=“A710”
AT!CUSTOM?
!CUSTOM:
GPSENABLE 0x01
GPIOSARENABLE 0x01
GPSSEL 0x01
IPV6ENABLE 0x01
UIM2ENABLE 0x01 --> UIM2ENABLE is enable
SIMLPM 0x01
USBSERIALENABLE 0x01
SINGLEAPNSWITCH 0x01
OK
AT!UIMS?
AT+CCID
AT+CEREG?
AT!UIMS=1
AT+CCID
AT+CEREG?