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someoneelse2222's avatar
someoneelse2222
Aspirant
Apr 13, 2026

MR6450 crashes when SIM card is used

Hi,

I have an issue with my MR6450, it works fine when there is no sim card inserted but as soon as it boots with one in it crashes?

Firmware version: NTGX6_12_74.00

mr6500

3 Replies

  • kimsh's avatar
    kimsh
    Aspirant
    Jul 04, 2026

    I experienced the same issue.

     

    As a workaround, I downgraded the firmware and have been using an older version without any problems.

     

    You may want to try firmware version **12.01.31.00**. On my MR6150, that version works normally in **4G+5G mode** and does not cause the reboot loop.

     

  • Fortra's avatar
    Fortra
    Luminary
    Jul 20, 2026

    @ someoneelse2222,

     

    someoneelse2222 wrote:

    I have an issue with my MR6450, it works fine when there is no sim card inserted but as soon as it boots with one in it crashes?

     

    Question is your mobile router a cellular region branded version, for example AT&T network or something else?