6 Replies Latest reply: Nov 30, 2012 4:09 PM by Rodney Hannah RSS

AT commands to switch between 2G and 3G

shak2m Novice

Hi there,

 

I am looking for AT commands that could force my modem to choose a 3G network instead of a 2G one. Do we have any control over that via AT commands? My modem and SIM are fully 3G capable. Right now when I do the COPS command, it returns a 2G network and not WCDMA.

Thanking you in anticipation.

 

Best regards,

Shak

  • Re: AT commands to switch between 2G and 3G
    Curtis Govan Expert

    Hi Shak,

     

    Such a command would be module specific.  Which module do you have?

     

    Regards,

    Curtis

    • Re: AT commands to switch between 2G and 3G
      shak2m Novice

      Hi Curtis,

       

      Thank you for your reply. I am using Telit UC864-G.

       

      Best regards,

      Shak

      • Re: AT commands to switch between 2G and 3G
        Newbie

        Hello Shak,

         

        In case 3G network is available in the test location and you use 3G SIM card, the module will camp on 3G network by default.

        In case there are some difficulties, you should be able manually to register on 3G network by using +COPS command.

         

        Please provide me the module's response on the next commands:

        AT+CGMR

        AT+CSQ

        AT+CPIN?

        AT+CREG?

        AT+CGREG?

        AT+COPS=? // it may take a few minutes to get response on this command

        AT+COPS?

         

        Please provide me also the AT command scenario you used to force module to camp on 3G network

         

        Finally, feel free to submit your technical inquiries to the Telit Support Desk at ts-northamerica@telit.com

         

        Regards,

        Vitaly

        • Re: AT commands to switch between 2G and 3G
          shak2m Novice

          Hi Vitaly,

           

          Thank you for your response. I was able to switch between 2G and 3G networks this morning.

           

          Firstly I executed the

           

          AT+COPS=?

           

          I recieved a few responses showing me GSM and UTRAN(3G) networks, the difference being that in the UTRAN networks the last digit is 2 and in GSM I think it is 0 or 1.

           

          Then I sent AT+COPS=1,1,"Network short name",2

           

          The network I wanted to join had both a GSM and 3G presence, so I simply chose the 2 at the end and hence 3G.

           

          Glad this is sorted.

           

          Thank you all for your responses.

           

          BR,

          Shak

          • Re: AT commands to switch between 2G and 3G
            Curtis Govan Expert

            Shak,

             

            Do consider that manually forcing the device to 2G or 3G means that you may lose connectivity when you otherwise wouldn't.  That is, when the network only has 2G or 3G coverage, the device won't automatically select the available technology.

             

            Vitaly - As an alternative to "AT+COPS=1,1", can "AT+COPS=4,2,<MCCMNC>,1/1" be used so that the device moves to the available network technology.  I'm certain this works in general for falling back to automatic network selection when the selected network is lost.

             

            Curtis

  • Re: AT commands to switch between 2G and 3G
    Newbie

    If you ever need further technical assistance you can reach our free support line

     

     

     

    Rodney Hannah

     

     

    Sales Engineer

     

     

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