Siemens TC37 Module At Command Reference page 184

AT Command Set
Code of <err> Meaning
213 SIM data download error
255 Unspecified error cause
300 ME failure
301 SMS service of ME reserved
302 Operation not allowed
303 Operation not supported
304 Invalid PDU mode parameter
305 Invalid text mode parameter
310 SIM not inserted
311 SIM PIN required
312 PH-SIM PIN required
313 SIM failure
314 SIM busy
315 SIM wrong
316 SIM PUK required
317 SIM PIN2 required
318 SIM PUK2 required
320 Memory failure
321 Invalid memory index
322 Memory full
330 SMSC address unknown
331 no network service
332 Network timeout
340 NO +CNMA ACK EXPECTED
500 Unknown error
512 User abort
Note:
If you attempt to use SMS related AT commands before inserting a SIM card or entering the SIM PIN,
the resulting errors will be delivered in the form of CME errors instead of CMS errors.
This is a normal behaviour since the GSM 07.05 based CMS errors are mapped to GSM 07.07 based
CME errors if SIM PIN authentication has not been done.
Example 1 The application tries to send a short message though the SIM card is not present:
AT+CMGF=1
OK
AT+CMGS=123456
+CME ERROR: 10
Example 2 The application tries to send a short message while the SIM card is present, but
PIN authentication has not yet been done.
AT+CMGF=1
OK
AT+CMGS=123456
+CME ERROR: 11
TC3X_ATC_01_V04.00
// Equivalent to + CMS ERROR: 310
// Equivalent to + CMS ERROR: 311
Page 184 of 204 29.05.2002