# Windows MC7700 how to change to use serial?

**URL:** <https://forum.sierrawireless.com/t/windows-mc7700-how-to-change-to-use-serial/25390>\
**Category:** MC/EM Series\
**Tags:** debug\
**Created:** [October 29, 2021, 6:24am UTC](https://forum.sierrawireless.com/t/windows-mc7700-how-to-change-to-use-serial/25390 "2021-10-29T06:24:34Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [October 29, 2021, 6:41am UTC](https://forum.sierrawireless.com/t/windows-mc7700-how-to-change-to-use-serial/25390/2 "2021-10-29T06:41:15Z")

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you can see here:

> [@\[MC7700\] Stuck in MBIM only mode - No available Serial Ports](https://forum.sierrawireless.com/t/mc7700-stuck-in-mbim-only-mode-no-available-serial-ports/8210):
>
> Hi there, I have a MC7700 unlocked Module that presents a Mobile Broadband interface only with no available Modem or serial ports whatsoever, The available MBIM network adapter works perfectly fine and i am able to connect to my provider’s network with no issues. However with no Modem or DM ports available and my MC7354 being out for warranty repair, my development work has screeched to an unpleasant standstill as i have very little knowledge of working with MBIM at the moment. I noticed that…

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