The redemption function is unlocked after completing the Prologue mission "Business x Strangeness x Justness."
Method 1: In-Game Redemption
- Tap the Menu icon in the upper-left corner.
- Select More, then choose Redemption Code.
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Enter your code and tap Confirm to claim your items.
Method 2: Official Website Redemption
- Visit the official redemption page at https://zenless.hoyoverse.com/redemption.
- Log in to your account.
- Follow the instructions on the page to redeem your code.