Introduction

"Not receiving verification codes" is one of the most common problems mainland China users encounter when using Binance. Whether registering, logging in, or performing security operations, SMS verification codes are a critical security verification step. When verification codes cannot be received normally, users may feel anxious, especially during urgent operations.

This article systematically analyzes the various reasons for not receiving verification codes and provides corresponding solutions.

1. Root Cause Analysis

Carrier Level

Reason 1: International SMS Blocking

Binance's verification code SMS messages are sent from overseas servers and are classified as international SMS. Some carriers have international SMS blocking enabled by default:

  • China Mobile: Some regions block international SMS by default
  • China Unicom: May classify international SMS as spam
  • China Telecom: Some plans do not include international SMS receiving capability

Reason 2: Number Segment Restrictions

Certain phone number segments may have compatibility issues with Binance's sending system, primarily:

  • Virtual carrier numbers (starting with 170, 171, etc.)
  • IoT numbers
  • Some newly opened number segments

Reason 3: Carrier Maintenance

During carrier system maintenance or outages, SMS services may be temporarily interrupted.

Phone Settings Level

Reason 1: SMS Blocking Software

Security software or SMS management apps installed on your phone may identify Binance's verification code SMS as spam:

  • 360 Mobile Guard
  • Tencent Mobile Manager
  • Built-in smart SMS filtering in phone systems

Reason 2: SMS Storage Full

When the phone's SMS storage space is full, new SMS messages may not be received normally.

Reason 3: Airplane Mode or Signal Issues

The phone being in airplane mode, having a weak signal, or SIM card contact issues can all cause SMS reception failure.

Binance Platform Level

Reason 1: Sending Frequency Limit

Frequently requesting verification codes may trigger the platform's rate limit, preventing further codes from being sent within a short period.

Reason 2: Platform System Maintenance

When Binance performs system maintenance or upgrades, the SMS sending service may be temporarily affected.

Reason 3: Regional Service Adjustments

Binance may adjust or restrict SMS services for specific regions.

2. Solutions

Solution 1: Check and Adjust Phone Settings

Step 1: Check the Spam SMS Folder

First, check your phone's spam or blocked SMS folder -- the verification code may have been incorrectly intercepted:

  • Android phones: Open the SMS app and check the "Blocked Messages" or "Spam Messages" folder
  • iPhone: Typically does not proactively block, but you can check "Unknown & Filtered Messages"

Step 2: Disable SMS Blocking Software

Temporarily disable all apps that might block SMS:

  1. Go to phone Settings and then App Management
  2. Find security apps (such as Mobile Manager, 360 Security Guard, etc.)
  3. Temporarily disable their SMS blocking features
  4. Or close these apps entirely and then re-request the verification code

Step 3: Check Phone Smart Filtering

Some phone systems (such as MIUI, ColorOS, etc.) have built-in smart SMS classification and filtering features:

  • MIUI: Settings, Spam Blocking, check blocked records
  • ColorOS: Messages, More, Spam Blocking
  • HarmonyOS: The smart assistant may automatically classify SMS

Step 4: Confirm Phone Signal Is Normal

  • Check phone signal strength
  • Try toggling airplane mode on and off, then retry
  • If in a basement or area with poor signal, move to a location with better reception

Step 5: Clear SMS Storage

Delete unnecessary old SMS messages to free up storage space.

Solution 2: Carrier Settings Adjustments

China Mobile Users:

  1. Call the 10086 customer service hotline
  2. Request to enable or confirm the "international SMS receiving" feature
  3. Also confirm that no SMS blacklist is set on your phone number
  4. You can also send specific SMS commands (exact commands vary by local carrier)

Or operate through the "China Mobile" app:

  1. Open the China Mobile app
  2. Go to "Value-Added Services" or "SMS Services"
  3. Confirm international SMS service status
  4. Check "SMS Blocking" settings

China Unicom Users:

  1. Call the 10010 customer service hotline
  2. Confirm the international SMS receiving feature is enabled
  3. Check if there are any SMS whitelist/blacklist settings
  4. Or self-query through the Unicom app

China Telecom Users:

  1. Call the 10000 customer service hotline
  2. Confirm your phone plan includes international SMS receiving
  3. Some Telecom plans require this feature to be activated separately
  4. Confirm that your number status is normal

Solution 3: Switch Verification Method

If SMS verification codes persistently cannot be received, consider switching to another verification method.

Use Email Verification Code:

If you have already bound an email:

  1. On the verification page, look for a "Switch Verification Method" option
  2. Select "Email Verification"
  3. The system will send a verification code to your bound email
  4. Check your email inbox (including the spam folder)

Use Google Authenticator:

If you have already set up Google Authenticator:

  1. Select "Authenticator Verification" on the verification page
  2. Open Google Authenticator
  3. Enter the current 6-digit dynamic verification code

Solution 4: Wait and Retry

If the issue is temporary:

  1. Wait 15-30 minutes before re-requesting a verification code
  2. Avoid clicking "Resend" frequently in a short period (this triggers rate limiting)
  3. Retry at different times of day (carriers may be under heavier load during certain periods)

Solution 5: Change Phone Number

If a specific phone number persistently cannot receive verification codes:

  1. Consider binding a new phone number to Binance
  2. If possible, use a number from a different carrier
  3. Changing your phone number requires first accessing your account through another verification method (email or Google Authenticator)

Solution 6: Contact Binance Customer Support

If none of the above solutions work:

  1. Access online customer support through the Binance app or website
  2. Describe the issue in detail (including phone number carrier, solutions already attempted)
  3. Customer support may provide a special verification method or manually send a verification code
  4. Submit a support ticket for follow-up

3. Detailed Troubleshooting Guide by Carrier

China Mobile

Troubleshooting steps:

  1. Confirm phone number status is normal (not suspended, no outstanding charges)
  2. Call 10086 to confirm the "international SMS" feature is enabled
  3. Confirm no SMS blocking or blacklist is set
  4. Check if the "incoming call/SMS spam blocking" value-added service is enabled
  5. If you are a Fetion user, check SMS filtering in Fetion settings

Common self-service operations:

  • Send "KTGJ" to 10086 to check international SMS status (exact commands vary by region)
  • Log in to the China Mobile app to view value-added service status

China Unicom

Troubleshooting steps:

  1. Confirm phone number is functioning normally
  2. Call 10010 to confirm international SMS permissions
  3. Check Unicom Mobile Manager blocking settings
  4. Confirm the blocking level of the "Smart Blocking" service

China Telecom

Troubleshooting steps:

  1. Confirm phone number is functioning normally
  2. Call 10000 to confirm international SMS feature
  3. Check security-related settings in the Telecom Tianyi app
  4. Some CDMA cards may require special configuration

4. Preventive Measures

Set Up Multiple Verification Methods

To avoid being unable to operate due to a single verification method failing, it is recommended to:

  1. Bind both phone number and email: They serve as backups for each other
  2. Enable Google Authenticator: The most reliable verification method, not dependent on network
  3. Set up a security key (advanced option): Hardware keys provide the highest level of security

Build Verification Method Redundancy

The ideal security verification configuration:

  • Primary verification method: Google Authenticator
  • Backup method 1: Email verification
  • Backup method 2: Phone SMS verification

This way, even if one method encounters issues, other methods remain available.

Regular Checks

  1. Periodically test whether SMS reception is working normally
  2. Confirm that your email can receive Binance notification emails normally
  3. Verify the time synchronization status of Google Authenticator

5. Emergency Situation Handling

Cannot Log In and Cannot Receive Verification Codes

If you cannot log into Binance and all verification methods are unavailable:

  1. Do not panic; your account assets are safe
  2. Find the "Security Verification Unavailable" entry on the Binance official website
  3. Follow the prompts to submit an identity verification application
  4. You may need to provide: ID card photos, selfie holding ID card, registration information, etc.
  5. Wait for manual review (usually 3-7 business days)

Verification Code Interrupted During a Trade

If you suddenly cannot receive a verification code during a trading operation:

  1. Do not repeatedly click send (avoid triggering rate limits)
  2. Try switching to another verification method
  3. If it is a withdrawal operation, the transaction will not execute automatically (unverified operations will time out and cancel)
  4. Try the operation again later

6. Frequently Asked Questions

Q1: I received the verification code but it has expired? Verification codes are typically valid for 5-10 minutes. If you frequently receive expired codes, it indicates severe SMS delay. It is recommended to switch to email verification or Google Authenticator.

Q2: The received verification code is garbled? This may be a phone SMS encoding issue. Try restarting your phone and requesting again. If it persists, contact your carrier to check SMS encoding settings.

Q3: After switching to a new phone number, can the old number still receive verification codes? If you have changed the bound phone number in Binance, the old number will no longer receive verification codes. If you have not changed the binding information, verification codes will still be sent to the old number.

Q4: Can I use an overseas phone number to replace my +86 number? Yes. If you have an overseas phone number that can receive SMS normally, you can change the bound phone number in Binance.

Summary

Not receiving Binance verification codes can be frustrating, but it can usually be resolved by troubleshooting phone settings, carrier configurations, or switching verification methods. The most important preventive measure is to set up multiple verification methods -- especially Google Authenticator, which does not depend on SMS services and is the most stable and reliable verification method.

It is recommended that all mainland users set up Google Authenticator and email verification immediately after registering on Binance, rather than relying solely on SMS verification codes. This way, even if SMS services experience issues, your normal usage will not be affected.

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