Fix Error Sending Code – Double Check Your Phone Number in Claude AI

Claude AI, developed by Anthropic, requires phone number verification to create an account, reset passwords, or enable two-factor authentication (2FA). However, many users encounter the error message: “Error sending code. Double check your phone number.”

This issue can prevent users from accessing Claude AI, delaying authentication and security verification. The error can stem from incorrect number entry, SMS delivery issues, or carrier restrictions. Below are practical solutions to resolve this problem.

Why Does Claude AI Show “Error Sending Code – Double Check Your Phone Number”?

This message means that Claude AI was unable to send an SMS verification code to your phone. The system uses SMS authentication to verify users,