Bip39 Android Default range of iterations used in wallets is 2048. Growing this variety need to allow it to be safer in opposition to brute drive attacks, however you'll have to store this price. To access your wallet with custom made PBKDF2 you must use this script (or similar) to https://gatherbookmarks.com/story19312355/seed-phrase-generator-checker-rumored-buzz-on-bip39-phrase