Update the Firmware on the Ledger Nano S is usually pretty easy, unless the firmware is 1.4. And guess what? This is a mandatory update by 3/20.
Instructions: https://support.ledgerwallet.com/hc/en-us/articles/360001340473
FAQ: https://support.ledgerwallet.com/hc/en-us/articles/360001341553
Reddit Post: https://www.reddit.com/r/ledgerwallet/comments/82e770/new_firmware_update_141_available_for_the_nano_s/
https://www.reddit.com/r/ledgerwallet/comments/82eza3/update_bug/
New Ledger Wallet Desktop in Q2: https://www.ledger.fr/2018/02/23/announcing-new-ledger-wallet-desktop-mobile-applications/
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