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FrederickGeek8 · 11-07-2025, 04:11 PM

Hi everyone! In the midst of trying to root my (US) BOOX Note Air 3, I upgraded without thinking from 3.5.4 to 4.1 via the `update.upx` from data.onyx-international.cn (rather than data.boox.com).

I would really like to downgrade to 3.5.4 but I am blocked from the normal System Update and `adb sideload` methods by an anti-rollback mechanism. How can I force a downgrade?

If necessary, I am prepared to lose all the data on my device.

Thanks for your help! Let me know if you want other information from me such as `edl` information.

11-07-2025, 04:11 PM	#1
FrederickGeek8 Junior Member Posts: 1 Karma: 10 Join Date: Nov 2025 Device: BOOX Note Air 3	Downgrade Note Air 3 Firmware Hi everyone! In the midst of trying to root my (US) BOOX Note Air 3, I upgraded without thinking from 3.5.4 to 4.1 via the `update.upx` from data.onyx-international.cn (rather than data.boox.com). I would really like to downgrade to 3.5.4 but I am blocked from the normal System Update and `adb sideload` methods by an anti-rollback mechanism. How can I force a downgrade? If necessary, I am prepared to lose all the data on my device. Thanks for your help! Let me know if you want other information from me such as `edl` information.