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