Trezor are thrilled to announce that the beta version of our new Bitcoin-only firmware is now available to download for both Trezor One and Trezor Model T. Trezor aim to introduce a stable version of Bitcoin-only firmware in the next month’s release. From now on, Trezor will be producing four different versions of firmware — regular (full altcoin support + U2F/WebAuthn) and Bitcoin-only, for both Trezor One and Model T.

Trezor have created a customized version of both our firmware and Wallet designed for everyone who supports the idea of Bitcoin. Every Bitcoin maximalist can now enjoy the Wallet interface with nothing else but Bitcoin. All the features of Trezor One and Model T available just the way you like it; Bitcoin only.

How to install Bitcoin-only firmware

Trezor recommend testing your recovery seed in a dry-run recovery before updating the firmware. It’s also essential to note that after installing Bitcoin-only firmware, all your other coins will disappear from the Wallet interface — but don’t worry! The private keys to your altcoins remain protected within your Trezor. The regular Trezor firmware is required to access your altcoins. You can swap between the regular firmware and Bitcoin-only firmware as many times as you like.

There are two ways of installing the Bitcoin-only firmware. You can use either Trezor Wallet or trezorctl (advanced users).

You will need:

• Trezor Model T running version 2.1.0 or newer, or Trezor One
• Access to Trezor Beta Wallet or trezorctl
• The correct firmware installation file for your device — Trezor One or Trezor Model T

Installation process using Trezor Wallet:

1. Visit https://beta-wallet.trezor.io/ and connect your Trezor.
2. If you are using Trezor Model T and your firmware version is lower than 2.1.0, upgrade to the latest offered version via web-wallet first!
3. Type “custom_firmware” after your Trezor device ID in the URL.
4. Download the firmware installation file for your device (Trezor One, Trezor T) and click on “Choose File” to upload the firmware file.
5. Trezor Wallet will then prompt you to initiate the firmware update process. Follow the instructions to load the firmware file on the device.

Installation process using trezorctl:

1. Download the correct file for your device.
2. Put your device into bootloader mode and confirm a connection with a host on device.
3. Launch Terminal and go to the folder with the firmware file.
4. If you have a Model T, update the firmware by pasting
   “trezorctl firmware-update -f trezor-2.1.5-bitcoinonly.bin” into the Terminal window and press enter. Confirm installation on the device.
   If you have a Trezor One, update the firmware by pasting
   “trezorctl firmware-update -f trezor-1.8.3-bitcoinonly.bin” into the Terminal and press enter. Confirm on the device.
5. Create a new wallet via https://beta-wallet.trezor.io/

Thank you for testing the Bitcoin-only firmware. If you experience any issues or want to share your ideas with us, please send us your feedback here.

Thank you for being a part of the Trezor beta testing community.