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10 sats \ 0 replies \ @btcthinker 29 Aug 2023 \ on: Best cheap hardware wallet bitcoin
Air-gapped operation is a good option for older mobile phones that are not connected to the Internet. It's just that there is currently no clean operating system (Networking must be removed) that can be easily installed on various mobile phones.
You can diy seedsigner.
https://github.com/SeedSigner/seedsigner