AT Commands ( Initialization )

From TechnologicalWiki

• AT+CPIN : Enter PIN - Important information - Enter CPIN before all other commands or trie to get SIM cards without PIN.

Obtaining a response like this :

   OK

• ATZ : Activate saved parameters ( activate user profile ).

Changing and saving parameters.

• AT+IPR=2400 : Transfer rate to 2400 bps.

• AT&W : save parameters.

• AT+CREG = <value> : Register Network.

    <value> = 0 log out.
            = 1 log in.

• AT+COPS? : Shows if network of SIM-card is available.

• AT+COPS=? : Available networks.

• AT+COPS=<mode>,<format>,<oper>

     <mode>  = 0 automatic (default).
             = 1 manual.
             = 2 deregistration.
             = 3 set only <format>
             = 4 manual / automatic (if manual fails, automatic mode is entered)

      <format>  = 0 long alphanumeric format <oper>.
                = 1 short alphanumeric format <oper>.
                = 2 numeric <oper>.

Example :

To register on home network: AT+COPS=0.

To set <format> to long alphanumeric: AT+COPS=3,0.

Now, you can ask for the Provider: AT+COPS=?.

Obtaining a response like this :

    +COPS: 0,0,"Orange F"
    OK

[edit] References

How To manage your cell phone using AT Commands