When was bip39 introduced https://felixkkjt585.theglensecret.com/bip39-word-checklist-generator-crafting-your-own-special-seed-phrase Mycelium - A cellular wallet that supports BIP39 seed phrases and has State-of-the-art features for electric power consumers. As opposed to standard wallets derived solely from a seed phrase, passphrase-safeguarded wallets are hidden from simple sight. ... https://files.fm/u/2eemhhak2q#design