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Chapter 4 – General AT Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 15
Request IMSI +CIMI
Description: Reads and identifies the IMSI (International Mobile Subscriber Identity) of the SIM card. The PIN may
need to be entered before reading the IMSI.
Values: No parameters
Syntax: AT+CIMI
Command Possible responses
AT+CIMI
Note: Read the IMSI
208200120320598
OK
Note: IMSI value (15 digits), starting with MCC (3 digits) / MNC (2 digits,
3 for PCS 1900)
Card Identification +CCID
Description: Orders the product to read the EF-CCID file on the SIM card.
Values: No parameters
Syntax: AT+CCID
Command Possible responses
AT+CCID
Note: Get card ID
+CCID: “123456789AB111213141”
Note: EF-CCID is present, hexadecimal format
AT+CCID?
Note: Get current value
+ CCID: “123456789AB111213141”
Note: Same result as +CCID
AT+CCID= ?
Note: Get possible value
OK
Note: No parameter but this command is valid
Note: If there is no EF-CCID file present on the SIM, the +CCID answer will not be sent, but the OK message will
be returned.
Capabilities List +GCAP
Description: Displays the complete list of capabilities.
Values: No parameters
Syntax: AT+GCAP
Command Possible responses
AT+GCAP
Note: Get capabilities list
+GCAP: +CGSM +FCLASS
OK
Note: Supports GSM and FAX commands
Repeat Last Command A/
Description: Repeats the previous command. Only the A/ command itself cannot be repeated.
Values: No parameters
Syntax: A/
Command Possible responses
A/
Note: Repeat last command