# Firmware update problem

**URL:** <https://forum.sierrawireless.com/t/firmware-update-problem/16822>\
**Category:** Legacy HL Series\
**Created:** [June 28, 2019, 6:50am UTC](https://forum.sierrawireless.com/t/firmware-update-problem/16822 "2019-06-28T06:50:09Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Yves](https://avatars.discourse-cdn.com/v4/letter/y/9e8a1a/32.png) [@Yves](https://forum.sierrawireless.com/u/Yves)\
**Post date:** [July 8, 2019, 7:54am UTC](https://forum.sierrawireless.com/t/firmware-update-problem/16822/5 "2019-07-08T07:54:53Z")

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Yes, with AT command.  
I follow related topic.

> [@HL8548 Modem firmware update error](https://forum.sierrawireless.com/t/hl8548-modem-firmware-update-error/16658/5):
>
> Hi @mlw, I have not looked or used that. Although, we are using a custom script to be used in production testing on the unit so it is not likely that click updater can be used. Thanks anyway.

I call provider support.  
I have a problem with TCP server Connection. There’s some topics reporting this works with previous version. so I try to downgrade from version 5.5.25 to 5.5.23. This operation hangs the modem, the format of the flash have changed. There is probably a another problem before the downgrade, because another modem with version 5.5.25 is all OK.

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