Updating the Firmware

Updating the firmware is essential to making sure that your Coldcard is not vulnerable to any new attack vectors.

1. Insert microSD card in computer (often it will appear as “NO NAME”);

2. Download latest firmware version from here onto microSD card;

3. Eject microSD card and insert it in your Coldcard;

To view your current version on your Coldcard, select “Advanced” > “Upgrade” > “View Version”.

4. Select “Advanced” > “Upgrade” > “From MicroSD card” > select the .dfu file.

5. Enter PIN code once upgrade is complete.

You don't need to update the firmware each time you want to receive funds. However, it's important to make sure it's up to date before sending bitcoin.

You will be back on the Coldcard's main menu, stay there until you read the instructions on the next page.

Now that your device is up to date with the latest firmware, we will proceed with the actual creation of your wallet.