Very cool I've been told one of the best cold storage wallets could be an old iphone or android that has no service on it but able to connect to wifi when its available and can also send and recieve bitcoin when its not in use simply turn off boom secured wallet

We need off-the-shelf options here in the third world. Not everyone here can afford a ledger or trezor, but android phones are everywhere. Not sure about this implementation. How to easily disable communications on an old phone and use it as an offline signing device? Interesting idea.