How to Bind a Backup Phone Number After Registering on OKX?

Binding a backup phone number after OKX registration is part of enhancing your security settings. The specific steps depend on whether you can still use the currently bound phone number. OKX allows users to add an alternative contact method, but in actual functionality, this is typically done through the "Change/Reset Phone Number" process rather than directly adding a "backup phone number" field within the account. The core purpose is to help you recover or reset access through alternative channels (email, Google Authenticator) if your primary phone number is lost or deactivated.

Prerequisites: Confirm Your Current Account Status

Before starting, confirm the following two things, as they will determine which path you need to take:

1. Can you still log in to your OKX account normally?

2. Can your currently bound phone number still receive SMS verification codes?

Step 1: Log In to Your Account and Enter the Security Settings Page

What to do: Log in to the OKX App or Web platform and find the account security settings entry.

How to do it:

• Open the OKX App or Web platform and log in to your account.

• App: Tap the profile icon in the top-left corner → [Security Settings].

• Web: Click on your profile in the top-right corner → [Security] or [Security Center].

When is this step complete? Once you are on the "Security Settings" page and can see options such as "Phone Verification" and "Google Authenticator".

Step 2: Choose Your Path Based on the Status of Your Old Phone Number

What to do: Find the phone number related option on the "Security Settings" page and choose the correct path based on your situation.

Case A: The currently bound phone number is still usable

1. On the [Security Settings] page, find the [Phone Verification] or [Phone Number] option and click [Change Phone Number] or [Change].

2. Follow the on-screen prompts to complete identity verification: You will usually need to enter the SMS verification code sent to your current phone number and the dynamic code from Google Authenticator (2FA).

3. After verification passes, enter your new phone number and enter the verification code sent to that new number.

4. Click [Confirm] to submit the change.

Case B: The currently bound phone number is deactivated or cannot receive verification codes

1. On the [Security Settings] - [Phone Verification] page, click [Change Phone Number].

2. At the verification step, click [Verification method unavailable] or [I need help].

3. The system will usually guide you to complete identity verification through "Face Recognition" to skip the SMS verification step.

4. Once face recognition passes, follow the prompts to enter your new phone number and complete verification.

When is this step complete? The system displays a message confirming the phone number change, and the new phone number has been bound.

Step 3: Special Cases – Merging Accounts

What to do: If the "backup phone number" you want to bind is already registered with another OKX account, you must go through the "Merge Account" process instead of a simple change.

How to do it:

• When changing your phone number, if the new number you enter is already bound to another OKX account, the system will show a pop-up notification.

• You can choose "Migrate Phone Number" or "Merge Account".

• Follow the instructions, and the phone number will be moved from the old account to your current main account, while the old account will be closed.

⚠️ Special Note: Merging accounts will close the other account. Before proceeding, make sure you have withdrawn all assets from the old account, otherwise those assets will be lost.

Common Reasons for Failure

1. Identity verification failed: Face recognition not passing, or the Google Authenticator (2FA) dynamic code was entered incorrectly. Ensure sufficient lighting and double-check the 6-digit code in your authenticator app.

2. The new phone number cannot receive the verification code: Confirm the phone number is entered correctly and can receive international SMS messages normally.

3. The new phone number is already occupied: Refer to "Step 3" – you need to go through the account merging process.

4. Withdrawal function temporarily restricted after the operation: For account security, after changing your phone number, email, or Google Authenticator, you will be unable to withdraw crypto or conduct C2C selling transactions for 24 hours. This is a normal security protection mechanism, not a malfunction.

Risk Reminders

• The bound phone number must be registered under your own real identity, otherwise it may be flagged by the platform's risk control.

• After changing security settings, your account funds will have a 24-hour withdrawal restriction. If you have urgent withdrawal needs, plan ahead.

• After replacing your phone number, it is recommended to also check and confirm whether Google Authenticator (2FA) is still valid to ensure the integrity of two-factor authentication.

How to Confirm You Have Completed the Operation Correctly

After successfully changing your phone number:

1. Check Security Settings: On the [Security Settings] page, confirm that the "Phone Verification" field displays your new phone number.

2. Test Login: Log out of your account and try logging in with your new phone number and password to verify normal access.

3. Watch for Email/SMS Notifications: You will receive a confirmation email or SMS from OKX about the phone number change. If not received, check your spam folder.