Список AT команд для HUAWEI E1550

Reset device 
ATZ

Modem information 
ATI

Selecting an APN 
+CGDCONT=1,”IP”,”apn name” e.g. for Vodafone UK - AT+CGDCONT=1,”IP”,”internet”

Querying signal strength 
+CSQ 
Returns two comma separated numbers. The first number is the signal strength (RSSI), the second number is unused. Here’s how to interpret RSSI: 0 ⇐ -113dBm 1 -111dBm 2 – 30 -109dBm to -53dBm 31 >= -51dBm 99 Unknown

Setting operating mode 
+CFUN=x 0 Low power mode 1 Online 4 Offline 6 Reset device 7 Turn off radio

Get manufacturer information 
+CGMI

Get software version 
+CGMR

Get SIM IMSI number 
+CIMI

Get device IMEI 
+CGSN

Get hardware version 

Change PIN 
+CPWD=SC,old pin, new pin

Enable PIN 
+CLCK=SC,mode,pin Mode: 0=unlock, 1=lock, 2=query state

Query system information 

Returns: status, domain, roaming status, mode, SIM state Status 0 No service. 1 Restricted service 2 Valid service 3 Restricted regional service. 4 Power-saving and deep sleep state Domain 0 No service. 1 Only CS service 2 Only PS service 3 PS+CS service 4 CS and PS not registered, searching Roaming 0 Non roaming state 1 Roaming state Mode 0 No service. 1 AMPS mode (not in use currently) 2 CDMA mode (not in use currently) 3 GSM/GPRS mode 4 HDR mode 5 WCDMA mode 6 GPS mode SIM state 0 Invalid USIM card state or pin code locked 1 Valid USIM card state 2 USIM is invalid in case of CS 3 USIM is invalid in case of PS 4 USIM is invalid in case of either CS or PS 255 USIM card is not existent