codex - 💡(How to fix) Fix Codex need phone number [11 comments, 7 participants]

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openai/codex#20161Fetched 2026-04-30 06:33:00
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What issue are you seeing?

I used Codex and decided to log in to my account on a different device. Now everything's broken, and when I log in via SSO, Codex asks me to enter my phone number. Why is this happening? I'am not add my phone in my account.

<img width="682" height="381" alt="Image" src="https://github.com/user-attachments/assets/d9b82cb9-b656-4e6f-b84d-e7e37d51b6df" />

What steps can reproduce the bug?

Log out in device and log in on another device with you credentials.

What is the expected behavior?

Old normal Auth process with SSO Google/Apple

Additional information

Reddit Link for problem

In my case. I have ChatGPT account with Google SSO maybe 3 years. Last month start use Codex. In my account not my phone number presents. Im from Kazakhstan and use Tele2 phone number.

extent analysis

TL;DR

The issue might be related to a change in Codex's authentication process, potentially triggered by logging in from a different device, and a possible workaround is to add a phone number to the account or try an alternative login method.

Guidance

  • The problem seems to occur when logging in from a different device using SSO credentials, which might indicate a device or session-related issue.
  • Try adding a phone number to the account to see if it resolves the issue, as Codex is explicitly asking for it.
  • Check the Reddit link provided for any updates or discussions related to this problem, as it might offer more insights or temporary solutions.
  • Consider reaching out to Codex support for further assistance, especially since the issue involves SSO and account settings.

Notes

The exact cause of the issue is unclear, and without more technical details about Codex's authentication system, it's difficult to provide a definitive fix. The suggestion to add a phone number is based on the error message received.

Recommendation

Apply workaround: Add a phone number to the account or explore alternative login methods, as this seems to be what Codex is prompting for, and it might temporarily resolve the login issue.

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codex - 💡(How to fix) Fix Codex need phone number [11 comments, 7 participants]