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ChatGPT/Codex Suddenly Requires Phone Verification: Why Chinese Numbers and VoIP Are Rejected, and How to Switch Numbers
When ChatGPT or Codex suddenly prompts for phone verification, it's usually blocked at two points: +86 isn't in OpenAI's supported regions, and VoIP numbers like Google Voice are detected and rejected. This article helps you identify the root cause based on the error, choose between short-term and long-term real mobile numbers, and walk through the correct steps for obtaining and using the number.
Stuck at Codex Login Verification? Try Using a SMS Receive Platform
Many developers face forced phone verification when logging into the Codex desktop client; using a reliable SMS receive platform for overseas temporary numbers can quickly bypass this step.
Codex Login Phone Verification: A Practical Guide Using SMS Reception Platforms
A step-by-step guide on using SMS reception platforms like NexSMS to bypass Codex login phone verification triggered by OpenAI's tightened security.
2026 Latest Codex Phone Verification Guide: How to Solve ChatGPT Phone Verification in China
A comprehensive guide for Chinese users to bypass OpenAI's phone verification for Codex, covering methods using overseas SIM cards and SMS reception platforms like NexSMS.
