---
title: Two Factor Authentication
description: Two-factor authentication setup and settings for smart locks.
---

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# Two Factor Authentication

❗This requires a registered TTLock account

- Download the TTLock application on *[Android](https://play.google.com/store/apps/details?id=com.tongtongsuo.app&hl=en_CA)* or [iOS](https://apps.apple.com/us/app/ttlock/id1033046018) devices
- Access the TTLock Web System on desktop*[here](https://lock2.ttlock.com/)*

❗Please note: this feature is not recommended and is not typically used for individual or public access doors in hotels, motels, or resorts.

#### Steps to enable two-factor authentication

1. Select the lock you want to configure, then tap Settings.
2. Enable Two-Factor Authentication for the selected lock.
3. When a code is entered or the lock is remotely unlocked, the lock will announce “Please insert second administrator.
4. A second administrator credential is required to complete the unlock.

#### If the lock unexpectedly requests a second administrator

- This means Two-Factor Authentication is enabled for that lock.
- Turn off Two-Factor Authentication in the lock settings to resolve the issue.

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