The device will warn you to store the phrase on another device (or, if you’re being really security minded, offline entirely), adding that if you lose it, then your wallet will be lost to the blockchain abyss if you need to recover it for whatver reason (instances where you might need to recover your wallet: your phone gets broken, your phone gets stolen or Thanos secures all the Infinity Stones). The app also assures you that Samsung has no access to your wallet, but that anyone with your seed phrase does.