Hello there
EC21-EUX return do not contain “ON”, if you want store in “ON”, you can execute AT$QCPBMPREF=1 then execute AT+CPBS=? will return “ON”, then you can write the phonenumber follow the step i provide you.
After write phonenumber, you can execute AT+CNUM read phonenumber.
It is worth noting that you must execute AT$QCPBMPREF=1(only once) before you execute AT+CNUM after reboot.
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