# WebOS Firmware 33.20.21

**URL:** <https://forum.webostv.developer.lge.com/t/webos-firmware-33-20-21/27901>\
**Category:** Others\
**Created:** [September 4, 2025, 1:24am UTC](https://forum.webostv.developer.lge.com/t/webos-firmware-33-20-21/27901 "2025-09-04T01:24:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![user873](https://avatars.discourse-cdn.com/v4/letter/u/87869e/32.png) [@user873](https://forum.webostv.developer.lge.com/u/user873)\
**Post date:** [September 4, 2025, 1:24am UTC](https://forum.webostv.developer.lge.com/t/webos-firmware-33-20-21/27901/1 "2025-09-04T01:24:16Z")

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Can somebody that works on WebOS verify where/when this firmware was used? I updated an LG C4 to this firmware believing it to be a delta version of WebOS 25, but it’s WebOS 24 firmware that seems to be meant for the C5. I’m now having trouble figuring out a way to get back to 23.23.05 which is the correct firmware for the C4.

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**Author:** ![narae0.kim](https://avatars.discourse-cdn.com/v4/letter/n/87869e/32.png) [@narae0.kim](https://forum.webostv.developer.lge.com/u/narae0.kim)\
**Post date:** [September 4, 2025, 1:25am UTC](https://forum.webostv.developer.lge.com/t/webos-firmware-33-20-21/27901/2 "2025-09-04T01:25:47Z")

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