I want to get the phone number of the sim being used. I believe it’s use “8.1. AT+CNUM Subscriber Number” (pg 110 of the manual) but this only returns OK with no other data. Trying AT+CNUM=? also just returns OK.
AT+CNUM
OK
AT+CNUM?
ERROR
AT+CNUM=?
OK
I haven’t found any suggestions that it needs to be in a particular mode.
Any help will be appreciated.
Thanks.
AT+CNUM returns the MSISDNs related to the subscriber.
But in many cases it will just return OK. This is because +CNUM command reads a special phone book storage area reserved for the SIM’s own phone numbers. The service provider may or may not store the phone number for you.
If you want to read the MSISDN with the +CNUM command and it is not currently programmed, follow the procedure below (but please know that almost every other device has it’s own set of rules for AT commands so it may vary from device to device, but the concept will be same): at+cnum?
at+cpbs? – display the active phonebook storage
+CPBS: “SM”,250,250
OK
at+cpbs=ON – select the active phonebook storage to MSISDN list
OK
at+cpbs? – display the active phonebook storage,
+CPBS: “ON”,0,3 – MSISDN list is empty
OK
at+cpbw=,”+91123456789″ – enter your own MSISDN
OK
at+cpbs? – display the active phonebook storage,
+CPBS: “ON”,1,3 – MSISDN list has one item
OK
at+cpbr=1 – reading MSISDN list, position 1
+CPBR: 1,”+91123456789″,145,”” – own MSISDN
OK
at+cnum
+CNUM: ,”+91123456789″,145 – own MSISDN