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When you decide to acquire a hardware wallet, you need to be very careful to buy a device that has not been compromised. Indeed, a widespread scam when it comes to hardware wallets consists in selling devices that have been previously tampered with. To avoid that, it is highly recommended to buy your device directly from the manufacturer website such as https://trezor.io or https://www.ledger.cominstead of going through third-party sellers such as Ebay. When you do receive your device, you need to make sure it is genuine and has not been tampered with, you follow the steps described here for Trezor and here for Ledger.