How to Fix Facebook not Sending Verification Code？

When registering or logging in with Facebook, SMS verification codes are a key method for identity verification. However, many users may encounter the issue of not receiving verification codes, which can render their accounts unusable. This article delves into common causes and offers targeted solutions to help you swiftly resolve the problem.

I. Common causes and targeted solutions

1. The network environment is abnormal or the IP is marked as risky

• Use of unstable VPNs or proxy servers (frequent node switching).
• IP addresses flagged as “unsafe” (e.g., public Wi-Fi or abused IP ranges).
• Cross-country/region network switching within a short period (triggering account risk controls).

• Disable unsafe proxies: Turn off public nodes in your phone or computer settings. If you must use special network tools, configure a clean proxy transfer.
• Set up a stable proxy service: If certain online tools are necessary, use a pure residential proxy like IPFoxy in your account environment.
• Switch network types: Toggle between Wi-Fi and mobile data (4G/5G), or try a different carrier’s SIM card.
• Restart your router: This resets the local IP address to prevent blacklisting.

2. Incorrect Mobile Number or Network Input

• Double-check the number format: International numbers must include a “+” and country code (e.g., +8613812345678).
• Dual-SIM phone users: Ensure the default SIM matches the registered number.
• Use a legitimate number: Choose a reliable virtual number.

3. SMS messages are blocked or classified as spam

• Android users: Open the SMS app → Click Settings → Check “Spam Blocking” or “Filtering Rules.”
• iPhone users: Go to “Settings” → “Messages” → Turn off “Filter Unknown Senders.”
• Search SMS content: Use keywords like “Facebook” or “verification code” in the SMS interface.

4. Regional restrictions or operator blocking

• Contact carrier customer service: Confirm if your number can receive overseas SMS.
• Use an alternative email: Bind an email address to receive verification codes (add it in advance via account settings).
• Check regional compliance: Ensure your network environment adheres to local regulations.

5. Facebook server abnormality

• Check Facebook’s status page or official Twitter: Get real-time updates.
• Wait 10–15 minutes before resending: Avoid peak traffic times.

6. Account Flagged as Suspicious by the System

• Visit Facebook’s appeal page: Upload identification documents (e.g., passport, ID card) as prompted.
• Use alternative email or friend verification: This is the fastest way to unlock your account.

II. Backup Plan and Customer Support

Get the mobile login password from the PC: You must be logged in to Facebook on your PC. Enable an app password in PC settings and use it to log in on your mobile device without a verification code.

Contact Facebook Customer Service : Fill out the form, provide detailed descriptions, attach screenshots or error codes, and expect a reply within 24–48 hours.

III. Preventive measures: reduce future CAPTCHA reliance

1. Bind Alternate Authentication Methods: Go to Account Settings → “Security & Login” → Add an alternative email and Google Authenticator.
2. Enable Two-Factor Authentication (2FA): Use app-generated dynamic codes instead of SMS to avoid signal issues.
3. Regularly Update Account Information: Ensure your mobile number and email are valid to prevent risk controls due to long-term inactivity.
4. Use Fixed IPs and Devices: When managing multiple accounts, combine unti-detect browsers with proxy tools to maintain a stable and clean account environment, reducing verification risks and code reception problems.

IV. Conclusion

Most verification code issues stem from minor oversights or temporary technical glitches. Follow the steps in this guide to troubleshoot, and most problems can be resolved independently. If unresolved, submit an appeal through official channels and retain relevant screenshots as evidence. Keeping your account information updated and enhancing multi-factor verification significantly improves account security and minimizes reliance on verification codes.