# How to reset MC7750 into QMI and AT-command mode on Linux?

**URL:** <https://forum.sierrawireless.com/t/how-to-reset-mc7750-into-qmi-and-at-command-mode-on-linux/29519>\
**Category:** Legacy AirPrime modules\
**Created:** [April 12, 2023, 7:23pm UTC](https://forum.sierrawireless.com/t/how-to-reset-mc7750-into-qmi-and-at-command-mode-on-linux/29519 "2023-04-12T19:23:34Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![cbldbssr](https://avatars.discourse-cdn.com/v4/letter/c/d6d6ee/32.png) [@cbldbssr](https://forum.sierrawireless.com/u/cbldbssr)\
**Post date:** [April 13, 2023, 7:56am UTC](https://forum.sierrawireless.com/t/how-to-reset-mc7750-into-qmi-and-at-command-mode-on-linux/29519/5 "2023-04-13T07:56:37Z")

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I will wait few days and will try to upgrade the firmware, but I don’t want to upgrade the firmware because of this other problem, with this other modem, which I am not sure is related to firmware version or not:

> [@MC7750 and \`CME ERROR: SIM wrong\` with various SIM cards](https://forum.sierrawireless.com/t/mc7750-and-cme-error-sim-wrong-with-various-sim-cards/29466/3):
>
> Could it be hardware issue on the sim slot pin from modem?

I am not sure is Verizon approved firmware - the latest firmware which I found at [https://source.sierrawireless.com/](https://source.sierrawireless.com/), going to work for any provider on the planet?

Also, I am not sure will firmware upgrade actually is going to work.

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