Bip39 wiki https://send.now/zchzg5fu4oku Mycelium - A cell wallet that supports BIP39 seed phrases and has Superior capabilities for power buyers. Just how much security does a passphrase add? A BIP39 passphrase appreciably improves your Bitcoin wallet’s protection. It acts as an extra, customizable layer in addition to your seed phrase. https://list.ly/i/11078004