How to Turn On Two-Factor Authentication on Viber: Step-by-Step

This article explains how to turn on two-factor authentication on Viber with a clear, step-by-step guide tailored to Viber’s interface and security model. Two-factor authentication (2FA) adds an extra layer of protection beyond the standard password by requiring a secondary verification method when logging in or performing sensitive actions.

To enable 2FA on Viber, users need the latest version of the app installed and access to their registered phone number or linked email for verification codes. The process involves navigating to specific settings within Viber, activating 2FA, and confirming the setup with a code sent via SMS or email.

Understanding what two-factor authentication protects on Viber—primarily account access and message security—is essential to appreciate its value. This article also covers troubleshooting common activation errors and managing 2FA settings after activation.

Before you start: What is needed to enable two-factor authentication on Viber?

Activating two-factor authentication (2FA) on Viber requires a few prerequisites to ensure a smooth setup process. First, the Viber app must be installed with the latest available version. Many users experience setup failures due to outdated app versions missing key security features. Access to the phone number linked to the Viber account is essential, as 2FA verification codes are sent via SMS or calls to this number during activation. A stable internet connection is also required to communicate with Viber’s servers and complete the process without interruption.

Viber’s 2FA system is device and phone number dependent; it does not use a separate authenticator app. This means the protection is tied directly to the registered device, emphasizing the importance of maintaining control over that phone number and device.

1. Confirm the Viber app is updated to the latest version. This can be checked in the device’s app store; successful updating shows an "Open" button instead of "Update".
   
2. Verify access to the phone number linked with the Viber account. The user should be able to receive SMS or calls on this number.
   
3. Ensure the device is connected to a reliable Wi-Fi or cellular data network. The Viber app should show an online status or recent activity.
   
4. Understand that 2FA on Viber is enabled per device linked to the phone number, without the need for third-party authenticator apps.
   

Tip: Before starting, close and reopen the Viber app to refresh network connections and app status.

How to find the two-factor authentication settings in Viber?

1. Open the Viber app on the device. The home screen with recent chats should appear.
2. Tap the 'More' icon (three horizontal lines or dots) located at the bottom right on iOS or top left on Android. This opens the main menu.
3. Select 'Settings' from the menu options. The Settings screen will display several categories.
4. Tap 'Privacy' to access security-related settings. This section contains options related to account protection.
5. Scroll down within Privacy until locating 'Two-step verification' or a similarly named option. This is where two-factor authentication settings reside.

The exact menu path is: More > Settings > Privacy > Two-step verification.

On Android, the 'More' icon is typically in the top left corner, while on iOS it appears at the bottom right. The 'Two-step verification' label is consistent across both platforms but may appear as 'Two-factor authentication' in some versions.

Tip: If 'Two-step verification' is not visible, confirm the app is updated to the latest version to ensure this feature is available.

What are the exact steps to enable two-factor authentication on Viber?

1. Tap on Two-step verification within the Viber security settings. This opens the setup screen prompting PIN creation.
2. Create a 4 to 6 digit PIN code. After entering the PIN, the app asks to confirm it by retyping the same code. Successfully confirmed, the app shows a message stating the PIN is set.
3. Optionally enter an email address for PIN recovery. This step is recommended to regain access if the PIN is forgotten. After entering the email, tap Next or Confirm to proceed.
4. Review the activation prompt summarizing that two-factor authentication is enabled and explaining that the PIN will be required when logging in on a new device. Tap Done to finalize the setup.

During this process, if the PIN entries do not match, the app will prompt to re-enter. The confirmation message typically reads, “Two-step verification is now active.”

Tip: Choose a PIN that is distinct from other common codes to strengthen security.

How does Viber’s two-factor authentication work in practice?

Viber’s two-factor authentication (2FA) centers on a PIN code uniquely tied to the user’s phone number and device. This PIN is required whenever a user tries to verify the phone number on a new device or reinstalls the app, acting as a gatekeeper to prevent unauthorized access. Unlike standard authenticator apps that generate time-based one-time passwords independent of the phone number, Viber’s 2FA relies on possession of the linked number and knowledge of the PIN.

The 2FA system protects the Viber account from unauthorized logins on new devices, making it ineffective if someone only steals the phone but cannot provide the PIN or access the linked phone number. However, it offers limited defense against SIM swap attacks since the attacker controlling the number might receive SMS verification codes. Viber’s 2FA specifically secures the login process rather than ongoing app usage on already authenticated devices.

In practice, when a login attempt triggers 2FA, users must enter the PIN before accessing the account. This mechanism adds a critical security layer beyond SMS verification, binding the account to both the device and a secret PIN.

What to do if two-factor authentication fails to activate on Viber?

Activation issues often stem from app version, connectivity, or input errors. First, confirm the Viber app is updated to the latest release by checking the Google Play Store or Apple App Store. Outdated versions may lack the 2FA feature or have bugs preventing activation.

Next, verify stable internet access and that the phone number linked to Viber is fully verified in the app settings. An unverified number can block 2FA setup. Also, ensure the chosen PIN complies with Viber’s security rules—usually a 4-6 digit numeric code without repeating or sequential digits.

If the two-factor authentication option is missing or unresponsive, restart the app or reboot the device. This refresh often resolves temporary glitches.

Common error messages include “PIN does not meet security requirements” and “Network error, please try again.” Address these by selecting a different PIN and checking network settings, respectively. Persistent errors warrant contacting Viber support through the app’s Help Center for detailed assistance.

1. Open the app store and update Viber – the 2FA option should appear under Privacy settings.
2. Check internet connectivity and confirm the phone number is verified – the 2FA toggle becomes active.
3. Enter a compliant PIN following Viber’s criteria – the app accepts the PIN without error.
4. Restart the app or device if the 2FA option is absent – it should appear after the restart.
5. If errors continue, submit a support request via Viber Help Center – receive guidance from support.

How to manage or disable two-factor authentication on Viber later?

Changing the PIN code

1. Open Viber and go to More > Settings > Privacy > Two-step verification.
2. Select “Change PIN.”
3. Enter the current PIN to verify identity.
4. Input the new PIN and confirm it.
5. Receive a confirmation message indicating the PIN was successfully updated.

Tip: Choose a PIN that is easy to remember but hard to guess to maintain security.

Updating the recovery email address

6. Within the same Two-step verification menu, tap “Update recovery email.”
7. Enter the new email address and confirm it by clicking the verification link sent to that email.
8. See confirmation in Viber that the recovery email has been updated.

Disabling two-factor authentication

9. Access More > Settings > Privacy > Two-step verification.
10. Select “Turn off two-step verification.”
11. Enter the current PIN to confirm the action.
12. Receive confirmation that two-factor authentication is disabled.

Warning: Disabling 2FA significantly reduces account security, increasing vulnerability to unauthorized access. It is recommended to disable only if absolutely necessary and consider updating the PIN or recovery email as alternatives.

Tip: Keeping 2FA enabled protects against unauthorized logins even if someone acquires the SMS verification code.

Frequently asked questions

Can two-factor authentication be enabled on Viber desktop or only on mobile?

Two-factor authentication on Viber can only be enabled and managed through the mobile app. The desktop version does not offer settings for activating or configuring 2FA. Users must use the mobile app to set up and modify two-factor authentication.

What should be done if the recovery email is lost or inaccessible?

If the recovery email is lost or inaccessible, regaining access to two-factor authentication settings can be difficult. Viber recommends updating the recovery email before losing access. Without access to the recovery email, account recovery options are limited, and contacting Viber support may be necessary.

Does Viber support authenticator apps like Google Authenticator for 2FA?

Viber's two-factor authentication does not currently support third-party authenticator apps such as Google Authenticator. The 2FA relies on a recovery email and verification codes sent by Viber directly. Users cannot integrate external authenticator apps for this security feature.

Will enabling two-factor authentication affect message backup or restoration?

Enabling two-factor authentication does not impact the ability to back up or restore messages on Viber. Message backups remain managed separately through the app’s standard backup options, typically linked to the device's cloud services. Two-factor authentication protects account access but does not alter backup functionality.

What this guide does not cover and when to seek additional security measures

Viber’s two-factor authentication relies on a PIN and device linkage, which strengthens account security but does not protect against SIM swapping or phishing attacks. Users concerned about these sophisticated threats should consider additional security layers such as carrier-level protections, anti-phishing training, and using secure messaging practices outside of Viber’s built-in options. This guide does not cover recovering accounts compromised through SIM hijacking or methods to secure the mobile number itself.

Tip: Regularly review and update the registered devices linked to the Viber account to detect any unauthorized access early.

The most practical next step after enabling two-factor authentication is to verify that the PIN prompt appears when logging in on a new device. This confirms the security feature is active and ensures the account is protected beyond the password. Monitoring login attempts and maintaining control over linked devices will maximize the benefit of Viber’s two-factor authentication setup.

See also: How to Turn On and Off Two-Factor Authentication on TikTok