This article details how to set up (initialize) your Trezor Model T hardware device for use with Casa App.
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To begin, verify the integrity of the device box and the device to ensure that it is free from tampering.
Once your Trezor Model T has been unboxed, head over to suite.trezor.io in your browser. You will have the choice either to Trezor's Desktop App, or use the web suite.
We recommend downloading the desktop app. The following instructions are written for the desktop app.
After downloading the desktop app, install it to your computer, open it up, and connect your Trezor Model T, using the cord provided.
If your device is not recognized once plugged in, head over to wallet.trezor.io/#/bridge to download Trezor Bridge and resolve this issue.
Next, you'll see a security check, which verifies the authenticity of your Trezor device. Click "Setup Trezor" at this step.
If this is your first time setting up this device, you'll be asked to do a firmware update.
Casa always recommends getting the latest firmware when initializing a device for the first time, before the key is used to secure funds. You can view the latest firmware versions for Trezor here.
Follow the steps show to update your firmware if needed.
Next, choose "Create New Wallet," and confirm the action on your device.
Now you'll need to complete the backup process. Choose "Wallet Backup," confirm the action on your Trezor device, then press "Create Backup." You'll then select "Standard seed backup" in the next window.
Next, you’ll set the PIN code on your Trezor. It’s very important that you do not forget this. A lost PIN is a lost key! If you are using multiple hardware devices, we recommend using the same a 4-8 character PIN (no zeros) across all your hardware devices, and saving it in a password manager.
Activate the bitcoin app for use with your Casa setup.
Finally, keep your Trezor somewhere safe and secret. Though there may not be funds in the wallet yet, keeping it secure and protected from tampering prior to funds placement is very important!
Your Trezor Model T can now be added to your Casa setup. See Adding Trezor to your Casa keyset for the next steps!
During this backup process, you’ll be prompted to write down the 12-word seed phrase.
Casa multisig allows for a "seedless" setup, so if you'll be using this Trezor Model T exclusively with Casa, then writing down the 12-word recovery seed is considered optional.
You can write down the seed phrase if you choose to. If you ever lose or break the device, the seed phrase will be able to restore the Casa signing key on a new device. If you do not, though, you will still be able to rotate your keys and move your funds to a new keyset easily, even without the seed phrase.
See: Seedless multisig for more info on this topic, and see what's right for you.
At this step, you can either "Begin Backup," or "Skip Backup" if you choose not to write down the seed phrase.