Troubleshooting Steps for Claude Sign-Up, Phone Verification, and Login Issues

Before attempting to sign up or log in to Claude, first confirm that your current network connection is located within a region officially supported by Anthropic. If the page immediately states that the service is unavailable in your region, or fails to redirect after you enter your email, it usually means your current network node is not on the official list of supported locations. Always refer to the official website for the most up-to-date list of supported countries and regions.

Additionally, browser cache and extensions can sometimes interfere with loading verification scripts. If you encounter a blank screen, redirect loops, or unresponsive buttons, try opening the login page in an incognito or private window, temporarily disabling ad blockers or script managers, and refreshing the page.

• Confirm your current network connection is in an officially supported region
• Reopen the login page using your browser's incognito or private mode
• Temporarily disable ad blockers or security extensions that might block verification scripts
• Clear your browser cookies and site cache data before trying again

Claude allows you to log in either by entering your email to receive a one-time verification code or by using third-party quick login options like Google or Apple. If you register with an email address but do not receive the verification email after waiting, it has likely been routed to your spam folder, or there is a delivery delay between your email provider and the official mail server.

To improve your sign-up success rate, it is generally recommended to use a mainstream international personal email service. Avoid temporary emails, disposable aliases, or custom corporate domain emails with strict filtering rules. If you choose a third-party quick login, make sure that the linked account is in good standing and has basic security settings configured.

• Check your spam, promotions, or updates folders first
• Add the official sender address to your email contacts or whitelist
• Use mainstream personal email services and avoid temporary disposable emails
• If email delivery continues to lag, try logging in directly with a Google or Apple account

After completing email verification for the first time, the system usually requires you to link a phone number and enter an SMS verification code. The phone number used in this step must also belong to an officially supported country or region and generally needs to be a standard mobile number from a physical carrier. Many virtual numbers or VoIP numbers are automatically detected by the system and blocked from receiving SMS codes.

If you confirm your number is eligible but still see a sending failure or fail to receive the text, you may have triggered a cooldown limit due to too many requests in a short period, or your carrier's international SMS gateway may be experiencing delays. Do not click the resend button repeatedly; instead, wait a while before trying again, and check whether your phone has blocked international messages from unknown senders.

• Ensure the phone number and country code you entered are on the official supported list
• Avoid using virtual VoIP numbers or shared numbers that have been linked multiple times
• Check if your phone's built-in security apps or carrier settings are blocking international texts
• If you hit a rate limit, pause all attempts and wait a few hours before trying again

Even with a successfully registered account, you may occasionally encounter errors during subsequent logins, such as 'too many requests,' expired sessions, or account access denials. A 'too many requests' error is typically caused by refreshing the page repeatedly in a short time or high concurrent traffic on the same network. Waiting briefly or switching to a more stable network connection usually restores normal login access.

If the page explicitly states that your account has been suspended or disabled for violating the terms of service, it means platform risk controls have been triggered. During daily use, always follow official usage guidelines and avoid sharing a single account across multiple devices and different regional networks at high frequencies. If you believe your normal usage was flagged by mistake, you can submit an explanation through the official appeal channel.

Once you can log into your Claude account reliably, you can choose a subscription plan that fits your needs. Currently, Claude offers Free, Pro, and Max (available in 5x and 20x tiers) plans for individuals, alongside Team and Enterprise plans for organizations. Both Pro and Max plans include access to Claude Code; please refer to the official website for current usage limits and benefits.

If you have a working personal account in good standing but lack an international payment method, you can upgrade via recharge through CatCard, an independent third-party website (not affiliated with Anthropic). Currently, our site offers a 1-month recharge for Claude Pro at ¥160, Max 5x for 1 month at ¥950, and Max 20x for 1 month at ¥1850, subject to real-time pricing on the product page. The purchase process is straightforward: complete payment on our site and look up your order using your contact info and lookup password → claim your redemption code on the order page → enter the redemption code and your account's sessionKey on the independent recharge portal to submit → log back into Claude to confirm your active subscription status.

• Before recharging, make sure you can log into your Claude account normally without restrictions
• After paying on our site, safely keep your order contact info and lookup password for order inquiries
• Go to the independent recharge portal and submit your redemption code along with your personal account's sessionKey to complete the upgrade
• Once redeemed, refresh or log back into Claude to verify the Pro or Max subscription badge