Downgrade firmware Model One

Process

• With your device connected, navigate to the Device settings in Suite by clicking the ‘Settings’ sign in the top-left corner and selecting the ‘Device’ tab
• To check which firmware version you currently have installed, scroll down to the ‘Firmware’ section, which displays the information about the firmware version:

• To proceed with installing custom firmware, scroll to the bottom of the page where you will find the ‘Danger Area’:

• Select the third option ‘Install firmware’, which will bring up the ‘Install custom firmware’ window:

• For step 1, click on the link ‘Download on github.com’, which will take you to the Trezor firmware repository on Github:

• Select the firmware version you wish to install, and download the appropriate .bin file to your computer
• In step 2 - ‘Upload firmware’ - you can either ‘drag and drop’ the downloaded file into the dashed box, or click the box and select the file manually:

• When you’ve done this, click the Install firmware button. You will then face a security checkpoint asking whether you have your Recovery Seed handy. Make sure that you do have your Recovery Seed with you, check the ‘Yes, I do!’ box, and then click Continue

• You’ll then be prompted to reboot your Trezor in bootloader mode by clicking the Confirm button on the device:

• You’ll then see the ‘Device is now ready’ dialogue, where you can click Install firmware to start the downgrade process

• You’ll then be prompted once more to confirm this action by pressing the Continue button on the device

• Once the process is complete, you’ll receive a confirmation dialogue, and can simply click on Close to end the downgrade process:

• As you’ve downgraded your firmware, Trezor Suite will display a blue update banner at the top of the screen. If you want to update your device, simply click on ‘Update now’ and follow the instructions:

Trezor Model One downgrade options