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That's true.Then what keep ledger wallet/trezor manufacturer from leaving a backdoor?

I figured this would be your rebuttal. Well trezor and ledger are proprietary and their codes never need to be opened. As for a phone unless this phone does not allow any 3rd party applications to install, it has to be opensource to allow for development.

If you watched the video you'd notice it is said that the company behind it is the best cybersecurity company in the world and they hired hackers to prove it.It only got announced 2 days ago.We'll hear more about it soon

You assume I didn't watch the video. Im pointing out that anything with this kind of exposure can be hacked. No matter how great you think you are, eventually someone will be better.

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