I would be interested to read that blog post, and I know WalletScrutiny could not verify source code for older version but that was one year ago.
This is not the first time I saw companies from China doing modification on source codes like this.
WalletScrutiny has successfully verified Keystone 3 Pro for six times. Now is it safe enough? See
https://walletscrutiny.com/hardware/keystone3.pro/#resultsArchiveI want to buy a Keystone, just for use with Metamask and to store altcoins, like ETH, Sol, USDT, USDC.
Considering that they only communicate through QR codes, and the firmware of Keystone and the Metamask app are both open-source, and come from different companies, wouldn't that make it more secure?