Can't Receive LINE Verification Code? Possible Reasons and Solutions

During the use of LINE, users may occasionally encounter issues where they cannot receive the verification code via SMS. This article provides a checklist of potential causes and practical solutions to help resolve verification problems.

I. Possible Reasons for Not Receiving the LINE Verification Code

1. Virtual Numbers

If you’re using a non-authenticated, low-quality virtual number with poor security, it may be blocked by the platform.

2. Number Blocked
If the number was previously involved in unusual or suspicious activities that triggered platform monitoring, it may have been flagged and blocked, resulting in failed SMS delivery.

3. Restricted Regions
Like many platforms, LINE services are not available globally. If you are in a restricted region, certain features may not work properly.

4. Unstable Network/Signal
An unstable device signal or being in airplane mode may prevent you from receiving SMS messages in time.

5. Untrusted Network
If the network you're using is considered untrustworthy—such as low-security public Wi-Fi, shared free IPs, or non-secure protocols—it may also prevent successful receipt of the verification code.

6. SMS Service Instability
The speed and success of SMS delivery can be affected by mobile carriers. Some regions or time slots may experience unstable service.

7. SMS Interception Settings
Message filtering features or firewall settings on the device may block SMS messages. Also, if LINE does not have SMS permission enabled on your device, you may fail to receive the code.

8. Incorrect Phone Number
Entering the wrong phone number is a common mistake, and it may take time to notice.

II. Solutions

In addition to checking the causes listed above and taking corresponding actions, you may try the following methods:

1. Voice Verification
In addition to SMS, LINE supports voice verification. Tap “Phone Verification” on the verification page and listen to the automated voice message for the code.

2. Email Verification
If your LINE account is linked to an email address, you can use it to receive the code. After logging in successfully, it is highly recommended to bind your email address to add an extra verification channel.

3. Restart
Restarting the device or the LINE app itself is always a worthwhile troubleshooting step.

4. Clear Cache or Update
Corrupted or outdated files in the app cache may cause verification issues. Try clearing the cache or updating LINE to the latest version.

5. Storage Space
Make sure your device has enough available storage space. Limited space may affect app functionality.

6. Platform Server Issues
If LINE’s servers are temporarily down, check the official announcements and try again later after the issue has been resolved.

7. Use a Reliable Network
Try adding “+86” followed by a space before your phone number. Use a secure and reliable network with a high level of authenticity to ensure proper verification and accurate location detection.
A recommended option is to use IPFoxy’s high-quality dedicated static residential proxy, which can provide a stable and trustworthy online identity throughout your use of LINE. This helps boost account credibility and reduces the chances of triggering risk control measures or additional verification steps.

III. Final Note

Identifying the cause early and using trusted network tools often resolves most verification issues effectively.