RetroCompass
RetroCompass

TrimUI Brick — Firmware update

Quick answer

Button combo

(hold VOL−)(hold VOL−)+POWER

Steps

  1. 1Check your version under Settings → System → Device Info → Version.
  2. 2Download the latest firmware_BRICK_tg3040 release from the official TrimUI GitHub.
  3. 3Format a microSD/TF card to FAT32 and copy trimui_tg3040.awimg to its root.
  4. 4Power off, then hold VOL− while pressing POWER and keep holding VOL−.
  5. 5Release when the progress bar appears; the Brick reboots automatically when done.
Last verified: 2026-06-20Source: github.com

TrimUI ships stock-OS updates for the Brick (model TG3040) as flashable images on its official firmware GitHub. The standard update copies a single trimui_tg3040.awimg file to a FAT32 microSD card and is applied by booting into update mode with the VOL− + POWER combo. The bar runs to 100%, then the device restarts into the updated TrimUI OS.

FAQ

Where do I download the firmware?
From the official TrimUI Brick firmware repository at github.com/trimui/firmware_brick/releases — pick the newest firmware_BRICK_tg3040 entry.
Do I need a special tool to write the image?
No. The .awimg is applied by the device itself from the card root; you do not need balenaEtcher. Just FAT32-format the card and copy the file.

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