Hello OpenAI Team, Case Number: 11516286 I’m experiencing a serious issue with signing in to the ChatGPT desktop app on macOS. I have successfully signed in to the same ChatGPT account on: ChatGPT Web ChatGPT Mobile App I have also enabled Advanced Account Security for my account. According to…

This is affecting all new developers in my company. Anyone that did not already authenticate before this phone number required process is not locked out of chat gpt. We are paying $100 per seat for people that cannot work. Solve this! @OpenAI_Support All employees have MFA enabled with authenticat…

Same issue here - can’t use my $200 Pro sub because of a phone number I allocated to my account back in the GPT 3.5 days. I honestly had no idea it had my old number as there is no where to view the accounts phone number until you get blocked by this message. UPDATE: I had to just give up - automat…

I am experiencing the same Codex authentication failure pattern on an individual ChatGPT Plus account. After completing the normal sign-in flow, I am redirected to /add-phone. However, the verification SMS is never delivered. I have tested three valid Indonesian mobile numbers from different opera…

Hello OpenAI Team, unfortunately, the issue still persists for my ChatGPT Business account after the August 18 changes. Normal ChatGPT login and authenticator MFA work, but Codex “Sign in with ChatGPT” still redirects me to /add-phone and asks me to add a new mobile number. Our company does not p…

Hey MCBrain, we can see our team has responded to you on the case id shared. It is an expected behaviour so please follow the guidance provided. Apologies for the inconvenience.

Unable to Sign In to ChatGPT Desktop on macOS Because SMS Verification Is the Only Login Option

ChatGPT Bugs

OpenAI_Support August 18, 2026, 1:21pm 5

Hey everyone, Our team has made some changes and this should now be resolved for most cases. Can you please confirm, if the issue still persists? Thank you!

Windows ChatGPT Desktop forces “Phone number required” while Web works normally — no mobile number, no alternative login

Topic		Replies	Views
After enabling advanced account security on the Codex app, phone number verification is mandatory (Case 10556951) Support	8	1400	July 16, 2026
ChatGPT Business: Windows app forces phone enrollment while web login and MFA work Bugs windows-app , codex-app	1	284	September 16, 2026
Codex Desktop still requires verification of inaccessible old phone number — Case 11547509 Support chatgpt	1	216	September 24, 2026
URGENT: Unable to Access Codex Because It Requires a Deactivated Old Phone Number Support codex , account-problem , support	2	433	September 26, 2026
Codex client auth forces WhatsApp code to a dead number — but ChatGPT/Codex web log in fine (Case 09491223) Codex account-problem	14	2324	June 4, 2026

Unable to Sign In to ChatGPT Desktop on macOS Because SMS Verification Is the Only Login Option

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