Claude phone verification: how it works and what to do if it fails
Quick answer
Anthropic may ask you to verify a phone number when you create a Claude.ai account. You enter the number, receive a code by SMS and type it in. If the code doesn't come or the number is refused, check the country code, wait before resending, and try another mobile number; VoIP numbers are often refused. A Noir SMS number can usually receive the code for your own account. Sign-in afterwards uses your email or Google login, not the phone.
Phone checks on AI apps are there to limit abuse of free usage. For a normal user they're a one-time step, but they can be frustrating when the code doesn't arrive.
The verification step
- Create the account with your email or Google sign-in.
- When asked, choose your country and enter the number.
- Type the code from the SMS. That's usually the only time the number is used.
If the number is refused
Services like this commonly reject VoIP numbers and numbers already used on other accounts. A fresh mobile number from Noir SMS usually works. If it's refused anyway or no SMS arrives within 20 minutes, the charge is refunded to your balance automatically.
Use it for your own account
Verify one account that you'll actually use. Creating multiple accounts to get around usage limits breaks the service's terms and our Acceptable Use Policy.
Frequently asked questions
Will I need the number again to log in?
Normally no. You sign in with your email link or Google account. Keep that email secure.
Is my number shown to anyone?
No, it's used for verification. If you want to keep your personal number out of it entirely, use a separate number.
Services in this guide
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