SimCom SIM7500 Series At Command Manual page 193

AT+CNUM
Defined values
<alpha>
Optional alphanumeric string associated with <number>, used character set should be the one
selected with command Select TE Character Set AT+CSCS.
<number>
String type phone number of format specified by <type>.
<type>
Type of address octet in integer format.see also
Examples
AT+CNUM
+CNUM: "","13697252277",129
OK
SIM7500_SIM7600 Series_AT Command Manual_V1.07
[+CNUM: <alpha>,<number>,<type>[<CR><LF>
+CNUM: <alpha>, <number>,<type>
OK
+CME ERROR: <err>
AT+CPBR <type>
Smart Machine Smart Decision
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192 2017-12-25