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IMSI attach flag

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  • #67898 Reply

    Hi Pix,

    What is the need of Network setting “IMSI attach flag” (0 or 1) in system information.

    I know if the IMSI attach flag is set to 1, MS will do IMSI attach or else It will do location update.

    But what condition Network will set it to 1 or 0.

    Thanks & Regards,
    selva n

    #67899 Reply


    it is the operator that chose to set it to “enable” or “disable”.
    if enable, the Ms is allowed to IMSI-ATTACH when it is switched on.
    if disable, the MS will not attach. Result : it cannot get paged, cannot receive calls.
    But it can make calls.

    Of course, all cells should have the IMSI-ATTACH = enable.

    In some rare cases, it could be useful to disable it, I guess, but I don’t have any example to give you.


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