PIN in our case is never stored on the device, it stored on the X1 cards that are EAL 5+ certified. The share on the device is encrypted too which is decrypted only when the card is unlocked. Hence, even if someone hacks the device, they cannot brute force the PIN.
Interesting.
So can you tell us what exactly is stored on actual Cypherock device?
There must be some data and information about accounts, history, transactions, so I wonder is that stored on device or also on cards?
I get the point that you wanted to achieve simplification with PIN code, but watching all Cypherock review videos I still think it's a bit complicated to handle and tap all those cards multiple times.
Few more negatives I noticed about Cypherock X1 and I want to see this being added in future, there is no support for Multisig, no support for full Bitcoin node, no signing messages, only one account for coin, no coin control.