Part 6/13:
Ledger Flex: Closed-source firmware; standard setup via Ledger Live, with options to migrate to third-party wallets supporting Ledger devices.
Blockstream Jade Plus: Fully open source; can be configured through Blockstream Green or other compatible apps, with ongoing enhancements embracing alternative methods like microSD updates.
Cold Card Q: Fully open source firmware; setup via Sparrow Wallet or Nunchuk. Firmware updates are offline, via microSD, with no proprietary app.
Bit Key: Currently closed source, strictly using the Bit Key app; no alternative software options are available at this time.
Security Features: Secure Elements and Open Source
Security is paramount; understanding each device’s architecture matters.