SMS Error code: +CMS
| Error | Description |
| CMS ERROR: 1 | Unassigned number |
| CMS ERROR: 8 | Operator determined barring |
| CMS ERROR: 10 | Call bared |
| CMS ERROR: 21 | Short message transfer rejected |
| CMS ERROR: 27 | Destination out of service |
| CMS ERROR: 28 | Unindentified subscriber |
| CMS ERROR: 29 | Facility rejected |
| CMS ERROR: 30 | Unknown subscriber |
| CMS ERROR: 38 | Network out of order |
| CMS ERROR: 41 | Temporary failure |
| CMS ERROR: 42 | Congestion |
| CMS ERROR: 47 | Recources unavailable |
| CMS ERROR: 50 | Requested facility not subscribed |
| CMS ERROR: 69 | Requested facility not implemented |
| CMS ERROR: 81 | Invalid short message transfer reference value |
| CMS ERROR: 95 | Invalid message unspecified |
| CMS ERROR: 96 | Invalid mandatory information |
| CMS ERROR: 97 | Message type non existent or not implemented |
| CMS ERROR: 98 | Message not compatible with short message protocol |
| CMS ERROR: 99 | Information element non-existent or not implemente |
| CMS ERROR: 111 | Protocol error, unspecified |
| CMS ERROR: 127 | Internetworking , unspecified |
| CMS ERROR: 128 | Telematic internetworking not supported |
| CMS ERROR: 129 | Short message type 0 not supported |
| CMS ERROR: 130 | Cannot replace short message |
| CMS ERROR: 143 | Unspecified TP-PID error |
| CMS ERROR: 144 | Data code scheme not supported |
| CMS ERROR: 145 | Message class not supported |
| CMS ERROR: 159 | Unspecified TP-DCS error |
| CMS ERROR: 160 | Command cannot be actioned |
| CMS ERROR: 161 | Command unsupported |
| CMS ERROR: 175 | Unspecified TP-Command error |
| CMS ERROR: 176 | TPDU not supported |
| CMS ERROR: 192 | SC busy |
| CMS ERROR: 193 | No SC subscription |
| CMS ERROR: 194 | SC System failure |
| CMS ERROR: 195 | Invalid SME address |
| CMS ERROR: 196 | Destination SME barred |
| CMS ERROR: 197 | SM Rejected-Duplicate SM |
| CMS ERROR: 198 | TP-VPF not supported |
| CMS ERROR: 199 | TP-VP not supported |
| CMS ERROR: 208 | D0 SIM SMS Storage full |
| CMS ERROR: 209 | No SMS Storage capability in SIM |
| CMS ERROR: 210 | Error in MS |
| CMS ERROR: 211 | Memory capacity exceeded |
| CMS ERROR: 212 | Sim application toolkit busy |
| CMS ERROR: 213 | SIM data download error |
| CMS ERROR: 255 | Unspecified error cause |
| CMS ERROR: 300 | ME Failure |
| CMS ERROR: 301 | SMS service of ME reserved |
| CMS ERROR: 302 | Operation not allowed |
| CMS ERROR: 303 | Operation not supported |
| CMS ERROR: 304 | Invalid PDU mode parameter |
| CMS ERROR: 305 | Invalid Text mode parameter |
| CMS ERROR: 310 | SIM not inserted |
| CMS ERROR: 311 | SIM PIN required |
| CMS ERROR: 312 | PH-SIM PIN required |
| CMS ERROR: 313 | SIM failure |
| CMS ERROR: 314 | SIM busy |
| CMS ERROR: 315 | SIM wrong |
| CMS ERROR: 316 | SIM PUK required |
| CMS ERROR: 317 | SIM PIN2 required |
| CMS ERROR: 318 | SIM PUK2 required |
| CMS ERROR: 320 | Memory failure |
| CMS ERROR: 321 | Invalid memory index |
| CMS ERROR: 322 | Memory full |
| CMS ERROR: 330 | SMSC address unknown |
| CMS ERROR: 331 | No network service |
| CMS ERROR: 332 | Network timeout |
| CMS ERROR: 340 | No +CNMA expected |
| CMS ERROR: 500 | Unknown error |
| CMS ERROR: 512 | User abort |
| CMS ERROR: 513 | Unable to store |
| CMS ERROR: 514 | Invalid Status |
| CMS ERROR: 515 | Device busy or Invalid Character in string |
| CMS ERROR: 516 | Invalid length |
| CMS ERROR: 517 | Invalid character in PDU |
| CMS ERROR: 518 | Invalid parameter |
| CMS ERROR: 519 | Invalid length or character |
| CMS ERROR: 520 | Invalid character in text |
| CMS ERROR: 521 | Timer expired |
| CMS ERROR: 522 | Operation temporary not allowed |
| CMS ERROR: 532 | SIM not ready |
| CMS ERROR: 534 | Cell Broadcast error unknown |
| CMS ERROR: 535 | Protocol stack busy |
| CMS ERROR: 538 | Invalid parameter |
这个并不是绝对的，具体的返回值及含义还是应该向芯片的提供商索要，因为不同的厂商都有自己的AT命令集和含义~
