load lineage OS onto an unlocked android phone bought with cash

buy esim sub with silent.link using btc, lightning or monero

download amber app, create nsec/npub
download 0xChat, use amber to log in

update your profile with [npub]@npub.cash

-- congrats, u now have an anon phone that can communicate on nostr, make calls on nostr, and can send and receive btc using the native wallet + npub.cash address. incredible!