GSM AT Commands
This page lists some of the GSM AT commands that I have previously archived. Just like dial-up modems of the old BBS’ing days all understand a standard set of AT commands, GSM phones and GSM terminals today also have a more or less standard set of AT commands.
| 1. Call Control |
| ATA |
Answer Command |
| ATD |
Dial Command |
| ATH |
Hang Up Call |
| ATL |
Monitor Speaker Loudness |
| ATM |
Monitor Speaker Mode |
| ATO |
Go On-Line |
| ATP |
Set Pulse Dial as Default |
| ATT |
Set Tone Dial as Default |
| AT+CSTA |
Select Type of Address |
| AT+CRC |
Cellular Result Codes |
| 2. Data Card Control Commands |
| ATI |
Identification |
| ATS |
Select an S-register |
| ATZ |
Recall Stored Profile |
| AT&F |
Restore Factory Settings |
| AT&V |
View Active Configuration |
| AT&W |
Store Parameters in Given Profile |
| AT&Y |
Select Set as s Powerup Option |
| AT+CLCK |
Facility Lock Command |
| AT+COLP |
Connected Line Identification Presentation |
| AT+GCAP |
Request Complete Capabilities List |
| AT+GMI |
Request Manufacturer Identification |
| AT+GMM |
Request Model Identification |
| AT+GMR |
Request Revision Identification |
| AT+GSN |
Request Product Serial Number Identification |
| 3. Phone Control Commands |
| AT+CBC |
Battery Charge |
| AT+CGMI |
Request Manufacturer Identification |
| AT+CGMM |
Request Model Identification |
| AT+CGMR |
Request Revision Identification |
| AT+CGSN |
Request Product Serial Number Identification |
| AT+CMEE |
Report Mobile Equipment Error |
| AT+CPAS |
Phone Activity Status |
| AT+CPBF |
Find Phone Book Entries |
| AT+CPBR |
Read Phone Book Entry |
| AT+CPBS |
Select Phone Book Memory Storage |
| AT+CPBW |
Write Phone Book Entry |
| AT+CSCS |
Select TE Character Set |
| AT+CSQ |
Signal Quality |
| 4. Computer Data Card Interface Commands |
| ATE |
Command Echo |
| ATQ |
Result Code Suppression |
| ATV |
Define Response Format |
| ATX |
Response Range Selection |
| AT&C |
Define DCD Usage |
| AT&D |
Define DTR Usage |
| AT&K |
Select Flow Control |
| AT&Q |
Define Communications Mode Option |
| AT&S |
Define DSR Option |
| AT+ICF |
DTE-DCE Character Framing |
| AT+IFC |
DTE-DCE Local Flow Control |
| AT+IPR |
Fixed DTE Rate |
| 5. Reporting Options Commands |
| AT+CLIP |
Calling Line Identification Presentation |
| AT+CR |
Service Reporting Control |
| AT+DR |
Data Compression Reporting |
| AT+ILRR |
DTE-DCE Local Rate Reporting |
| 6. Network Communication Parameter Commands |
| AT+CREG? |
Network registration status. Also AT+CREG=?. |
| AT+COPS? |
List of available operators. Also AT+COPS=?. |
| ATB |
Communications Standard Option |
| AT+CBST |
Select Bearer Service Type |
| AT+CEER |
Extended Error Report |
| AT+CRLP |
Radio Link Protocol |
| AT+DS |
Data Compression |
| 7. Miscellaneous Commands |
| A/ |
Re-Execute Command Line |
| AT? |
Command Help |
| AT*C |
Start SMS Interpreter |
| AT*T |
Enter SMS Block Mode Protocol |
| AT*V |
Activate V.25bis Mode |
| AT*NOKIATEST |
Test Command |
| AT+CESP |
Enter SMS Block Mode Protocol |
| 8. SMS Commands SMS Text Mode |
| AT+CSMS |
Select Message Service |
| AT+CPMS |
Preferred Message Storage |
| AT+CMGF |
Message Format |
| AT+CSCA |
Service Centre Address |
| AT+CSMP |
Set Text Mode Parameters |
| AT+CSDH |
Show Text Mode Parameters |
| AT+CSCB |
Select Cell Broadcast Message Types |
| AT+CSAS |
Save Settings |
| AT+CRES |
Restore Settings |
| AT+CNMI |
New Message Indications to TE |
| AT+CMGL |
List Messages |
| AT+CMGR |
Read Message |
| AT+CMGS |
Send Message |
| AT+CMSS |
Send Message from Storage |
| AT+CMGW |
Write Message to Memory |
| AT+CMGD |
Delete Message |
If you have any updates to share, do let me know 
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