Seed Phrase Generator Offline. From this place forward the seed may very well be prepared on paper or spoken more than phone which opened up new, physical means of backing up the seed (several paper copies in various areas, durable copies on steel plates with more safety from fire/flood etc.). https://marcooetix.wikitelevisions.com/6904108/the_anatomy_of_the_bip39_phrase_entropy_words_and_phrases_and_protection