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SIM900 AT Command Manual

searching an operator to register to

The GPRS service is enabled, but an allowable PLMN is

currently not available. The UE will start a GPRS

attach as soon as an allowable PLMN is available.

3 Registration denied

The GPRS service is disabled, the UE is not allowed to

attach for GPRS if it is requested by the user.

4 Unknown

5 Registered, roaming

<lac> string type (string should be included in quotation marks); two

byte location area code in hexadecimal format (e.g. "00C3"

equals 195 in decimal)

<ci> string type (string should be included in quotation marks); two

bytes cell ID in hexadecimal format

Reference

Note

7.2.11 AT+CGSMS Select Service for MO SMS Messages

AT+CGSMS Select Service for MO SMS Messages

Response

+CGSMS: (list of currently available <service>s)

Test Command

AT+CGSMS=?

Parameter

See Write Command

Response

+CGSMS: <service>

Read Command

AT+CGSMS?

Parameter

See Write Command

Response

If error is related to ME functionality:

+CME ERROR: <err>

Write Command

AT+CGSMS=<se

rvice>

Parameter

<service> a numeric parameter which indicates the service or service

preference to be used

0 Packet Domain

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Elec Freaks Bluetooth Modem Spezifikationen Seite 167