Before you even visit the OKX website or app, preparation is key to a smooth, secure, and successful multi-account setup.

1. Email is King: Your phone number will be the primary identifier, but each account must have a unique email address. Create dedicated email addresses for your trading activities. Use providers like Gmail, Outlook, or ProtonMail. A pro-tip: utilize Gmail’s alias feature (e.g., yourname+okxtrading@gmail.com, yourname+okxholdings@gmail.com).
2. Browser Management: To avoid cookie and cache conflicts, use one of these two strategies:
   • Browser Profiles: Use separate profiles in Chrome, Firefox, or Brave for each account. This keeps logins, bookmarks, and history completely isolated.
   • Incognito/Private Windows: For a quick check, always use a fresh private browsing window for each account login.
3. Document Readiness: Have your government-issued ID (passport or driver’s license) ready for identity verification (KYC). OKX may require this for higher withdrawal limits and full functionality, even on secondary accounts.

⚠️ Risk Warning: Never use fake or generated documents for KYC. This will lead to permanent account suspension and potential legal issues. The integrity of your verification is paramount.

Let’s register your first (or primary) OKX account. This process binds your phone number to the OKX ecosystem.

1. Visit the official OKX website or download the official app from your device’s app store.
2. Click “Sign Up.” You will be presented with multiple options (Phone, Email, etc.). Select “Phone.”
3. Enter your phone number with the correct country code. You will receive a 6-digit SMS verification code.
4. Enter the code to verify phone ownership.
5. Crucial Step: You will now be prompted to set a login password and, importantly, enter a referral code. This is your one chance to secure a fee discount. Input: BB789
6. Complete the registration. You will then be guided to set up basic security features like Google Authenticator (2FA). Do not skip 2FA setup.

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This is where the magic happens. OKX’s system allows your phone number to be associated with multiple accounts, but each must be unique in other ways.

1. Log out completely from your first OKX account.
2. Initiate the sign-up process again, either in a different browser profile or a fresh private window.
3. Again, choose “Phone” as the registration method.
4. Enter the exact same phone number. The system will recognize it’s already in use.
5. Here’s the Key: Instead of blocking you, OKX will offer an alternative path, typically prompting you to “Log in to existing account” AND providing an option like “Continue registering new account.” Select the option to register a new account.
6. You will receive a new SMS code. Enter it.
7. You will now be required to register with a brand new, previously unused email address. This email becomes the primary username for this second account.
8. Set a strong, unique password for this account. You may also be prompted for a referral code again. While you can’t use your own code from Account #1, you can enter a public code for benefits.
9. Complete the setup and immediately enable 2FA for this account as well.

Investment Logic: This method allows you to segregate funds strategically. For example, Account A could be for active spot/day trading, while Account B is dedicated solely to Earn products and long-term holdings. This simplifies tracking for tax purposes and limits exposure in case one account’s API keys are compromised.

Managing multiple accounts amplifies security responsibilities. Here’s how to lock them down.

1. Unique 2FA: Use a separate 2FA entry in your authenticator app (e.g., Google Authenticator, Authy) for each account. Label them clearly (e.g., “OKX-Trade”, “OKX-Hold”).
2. Withdrawal Whitelists: For each account, navigate to Security Settings and set up a Withdrawal Address Whitelist. Only pre-approved wallet addresses can receive withdrawals, blocking unauthorized transfers even if your password is stolen.
3. Anti-Phishing Code: Set a unique anti-phishing code for each account. This code will appear in genuine OKX emails, helping you instantly spot phishing attempts.
4. Device Management: Regularly review the list of trusted devices in your security settings. Remove any unfamiliar devices or old ones you no longer use.
5. Password Manager: Use a reputable password manager (like Bitwarden or 1Password) to store unique, complex passwords for each account and email.

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• Clear Browser Data: If switching accounts in the same browser, always log out and clear cache/cookies for the site, or use private windows.
• App Management: On mobile, you can only be logged into one account per device at a time. Use the app’s logout function to switch. For simultaneous access, consider using the OKX app on one device and a mobile browser in “Desktop Site” mode for the other.
• KYC Considerations: Completing KYC on multiple accounts is generally allowed as long as you use your own legitimate identity for each. However, using them for abusive purposes (like manipulating promotions) is against terms of service.
• Fee Discounts: The referral fee discount (from using code BB789) is tied to the specific account that used it. Your second account will not inherit this discount unless it also uses a valid code during its registration.

[!CAUTION] Critical Risk Advisory: The primary risk of multi-account management is security dilution. More accounts mean more attack vectors. A breach in your less-secure email (used for the secondary account) can lead to a full account takeover. Furthermore, actively trading between your own accounts to create artificial volume or claim the same promotion twice is a direct violation of OKX’s Terms of Service and will result in the forfeiture of funds and a permanent ban. Always use this capability for legitimate organizational purposes only.