[BUG] Phone number verification fails for Sri Lankan numbers (+94) during Claude Code Team onboarding

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Users invited to Claude Code Team Pro are unable to complete onboarding due to failure in phone number verification.

When entering valid Sri Lankan mobile numbers (+94) in international format, the verification step fails and prevents users from proceeding.

This issue is consistently reproducible across multiple users, carriers, and devices, effectively blocking access to the product.

What Should Happen?

Users should be able to successfully verify their phone numbers and complete onboarding using valid Sri Lankan mobile numbers (+94).

Upon entering a valid number, an OTP should be delivered, allowing the user to proceed and gain access to Claude Code Team Pro without errors.

Error Messages/Logs

"Unable to send verification code to this number. Try a different number or try again later"

Steps to Reproduce

1. Invite a new user to a Claude Code Team Pro workspace
2. User receives the invitation email from Anthropic
3. User accepts the invitation and proceeds to onboarding
4. User is prompted to verify their phone number
5. Enter a valid Sri Lankan mobile number in international format (e.g., +947XXXXXXXX)
6. Submit the number for OTP verification
7. Observe the error message

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude Code (Team Pro) – Web onboarding flow (no explicit version available, issue observed as of March 2026)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_