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Thread: Qualcomm DIAG port worries

  1. #1
    Junior Member Reputation: 10
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    Default Qualcomm DIAG port worries

    Good day everyone!


    i've been tinkering around with an android phone with a Qualcomm snapdragon chipset and after a few stumbles i found a way to do a LTE cell lock (pci + earfcn lock) albeit needing a ue reboot ... now commercial software available does it without restarting the phone, so i suspect that they do it via some sort of request/command on the diag port forcing the modem subsystem to reset.

    So saying that, my question for you gents is: My suspicions are correct? is there any diag port request/command to force a modem reset? if so what is it?

    Thanks

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  4. #2
    VIP Member Reputation: 1852 carver's Avatar
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    Default Re: Qualcomm DIAG port worries

    I think your best friend is USBTrace.

    in it you can see there is an exchange,
    unless such programs as dc-unlocker, or protected Winlicense/Themida -
    don't start with many port/file/reg sniffers.

    You can use a hardware USB sniffer for them.


    diag cmd can be sent in QXDM, in qtools(example here), and in owns programs.

    qcommand -p3 -e -c "c 29 02 00" // here reset/offline example
    /carv

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  6. #3
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    Default Re: Qualcomm DIAG port worries

    Thank you for the info.

    Ill give it a go with the reset example you gave and report back with results

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