Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 120 12/24/2010
6 AT Commands Special for SIMCOM
6.1 Overview
Command Description
AT+SIDET CHANGE THE SIDE TONE GAIN LEVEL
AT+ CP OW D POWER OFF
AT+SPIC TIMES REMAINED TO INPUT SIM PIN/PUK
AT+ CM IC CHANGE THE MICROPHONE GAIN LEVEL
AT+CALA SET ALARM TIME
AT+CALD DELETE ALARM
AT+CADC READ ADC
AT+CSNS SINGLE NUMBERING SCHEME
AT+CDSCB RESET CELL BROADCAST
AT+CMOD CONFIGURE ALTERNATING MODE CALLS
AT+CFGRI INDICATE RI WHEN USING URC
AT+ CLT S GET LOCAL TIMESTAMP
AT+CEXTHS EXTERNAL HEADSET JACK CONTROL
AT+CEXTBUT HEADSET BUTTON STATUS REPORTING
AT+CSMINS SIM INSERTED STATUS REPORTING
AT+CLDTMF LOCAL DTMF TONE GENERATION
AT+CDRIND CS VOICE/DATA CALL TERMINATION INDICATION
AT+CSPN GET SERVICE PROVIDER NAME FROM SIM
AT+CCVM GET AND SET THE VOICE MAIL NUMBER ON THE SIM
AT+CBAND GET AND SET MOBILE OPERATION BAND
AT+ CH F CONFIGURE HANDS FREE OPERATION
AT+CHFA SWAP THE AUDIO CHANNELS
AT+ CS CLK CONFIGURE SLOW CLOCK
AT+CENG SWITCH ON OR OFF ENGINEERING MODE
AT+ SC LAS S0 STORE CLASS 0 SMS TO SIM WHEN RECEIVED CLASS 0 SMS
AT+CCID SHOW ICCID
AT+CMTE SET CRITICAL TEMPERATURE OPERATING MODE OR QUERY
TEMPERATURE
AT+CBTE BATTERY TEMPERATURE QUERY
AT+ CS DT SWITCH ON OR OFF DETECTING SIM CARD
AT+CMGDA DELETE ALL SMS
AT+STTONE PLAY SIM TOOLKIT TONE
AT+SIMTONE GENERATE SPECIFIC TONE