Updating a linked phone number on Binance is a critical maintenance task for account security and accessibility. Whether due to a change in service providers, number expiration, or personal preference, ensuring that the linked mobile number is current is essential for receiving SMS verification codes. This process can be completed via the Binance official website or the Binance Official App. The specific steps vary depending on whether the previous mobile number remains accessible. Apple users requiring app updates or reinstallation may consult the iOS installation tutorial.
Scenario 1: The Old Phone Number is Accessible
If the previous mobile number is still active and capable of receiving SMS messages, the update process is relatively straightforward.
Procedure via the Mobile App
- Launch the Binance app and navigate to the user profile by selecting the avatar icon in the top-left corner.
- Enter the "Security" or "Security Settings" section.
- Select "Phone Verification," which displays the currently linked number.
- Click "Change" or "Edit."
- The system will issue a verification code to the old phone number. If Two-Factor Authentication (2FA) via email or Google Authenticator is enabled, additional codes from those platforms will be required.
- Upon successful verification of the old number, enter the new mobile number.
- Verify the new number using the code sent via SMS to complete the binding process.
Procedure via the Web Interface
- Log in to the Binance official website and access "Account Settings" from the profile menu.
- Navigate to the "Security" page.
- The steps mirror the app process: verify the old number, input the new number, verify the new number, and finalize the changes.
Critical Post-Update Note
For security purposes, Binance imposes a 24-hour withdrawal restriction following a change to the linked phone number. This measure is designed to protect account assets in the event of unauthorized access. Normal withdrawal functionality is automatically restored after this period. Additionally, previously trusted devices may be cleared, requiring re-verification upon the next login.
Scenario 2: The Old Phone Number is Inaccessible
If the old phone number is no longer active or available, alternative verification methods are necessary.
Method 1: Utilizing Alternative Verification Methods
If the account has an associated email address or Google Authenticator (2FA) enabled, these can be used to bypass the SMS requirement. During the phone modification process, look for an option labeled "Security verification unavailable?" or "Try another verification method." Select the available methods (e.g., Email + Google Authenticator) to verify identity and link the new number.
Method 2: Manual Review via Customer Support
If alternative 2FA methods are not available, users must contact Binance Customer Support for a manual identity review. This involves submitting a request for a phone number change. Requirements typically include:
- Identity Documentation: High-quality photographs of the front and back of a government-issued ID.
- Selfie Verification: A photograph of the user holding their ID alongside a handwritten note specifying the current date and the request (e.g., "Request to change linked phone number").
- Account Context: Information such as the registered email, account creation date, and recent login or transaction history.
- Statement of Reason: A brief explanation as to why the old phone number is no longer accessible (e.g., deactivated or recycled by the carrier).
The review process by the Binance security team generally takes between 1 and 7 business days, depending on the volume of requests and the clarity of the provided documentation.
Method 3: Temporary Restoration of the Old Number
If the old number was recently deactivated but not yet recycled by the carrier, it may be possible to request a temporary restoration. Most carriers allow for reactivation within a specific window (typically 90 days). If restored, the number can be used to complete the standard change process on Binance before permanent deactivation.
Handling Specific Circumstances
- Recycled Numbers: If an old number is reassigned to a new user, account security may be compromised. Users should immediately contact Binance support to update the linked number and monitor the account for unauthorized login activity.
- International Numbers: Binance supports mobile numbers from most global regions. When entering a new number, ensure the correct international country code (e.g., +1 for the USA, +44 for the UK) is selected.
- Identity Consistency: It is strongly recommended to use a mobile number registered under the same name as the Binance account identity verification (KYC). Discrepancies between the phone owner and account holder may complicate manual review processes.
Post-Modification Checklist
After successfully updating the phone number, users should perform the following actions:
- Review All Security Settings: Verify that Google Authenticator, email binding, anti-phishing codes, and password strength are all optimal.
- Audit Trusted Devices: Check the list of authorized devices in the security settings and remove any unrecognized or obsolete devices.
- Verify API Keys: For users utilizing API trading, it is a recommended practice to inspect API keys for any anomalies following sensitive account changes.
- Record the New Number: Ensure the new linked number is documented in a secure location, such as a password manager.
Preventative Measures
- Diversify Verification Methods: Do not rely solely on SMS. Enabling multiple forms of 2FA (Email, Google Authenticator, Security Keys) ensures account access if one method fails.
- Proactive Updates: Always update linked services before deactivating a mobile number. This includes banking, social media, and financial platforms like Binance.
- Use Stable Numbers: Avoid using temporary or nearly expired mobile numbers for critical financial accounts.
Conclusion
Promptly updating a linked phone number is vital for maintaining account access and security on Binance. While the process is straightforward when the old number is accessible, manual review options exist for users who have lost access to their previous SIM card. Diversifying security measures remains the most effective way to prevent future access issues.