Android ChatGPT app cannot connect to Codex Desktop on Windows

What version of the Codex App are you using (From “About Codex” dialog)?

Codex Desktop 26.527.31326 Windows package: OpenAI.Codex 26.527.3686.0 app-server: 0.135.0-alpha.1

What subscription do you have?

ChatGPT Pro

What platform is your computer?

Windows 11 Pro, OS version 10.0.26200, x86_64

What issue are you seeing?

I cannot connect from the ChatGPT Android app to Codex Desktop on my Windows PC.

The Android app shows my PC in the Codex mobile device list, but when I select it, it fails with a message like "Could not connect to Codex Desktop".

The PC appears to be online from the backend side. I checked the remote control environments endpoint and it returned online=true, busy=false for this Windows Codex Desktop environment.

I also reset the local Codex remote-control enrollment on the Windows PC. This regenerated the environment/server IDs, but the Android app still cannot connect.

What steps can reproduce the bug?

1. Open Codex Desktop on Windows.
2. Open the remote control / Codex mobile pairing screen.
3. Open the ChatGPT Android app.
4. Go to Codex mobile / remote control.
5. Select the Windows PC shown in the device list.
6. The app tries to connect, then fails with "Could not connect to Codex Desktop".

What is the expected behavior?

The Android ChatGPT app should connect to Codex Desktop and allow remote control.

Additional information

Android device: NX769J
Android version: Android 14
ChatGPT Android app version: 1.2026.146
Computer name shown in Codex mobile: Yuu-roomPC

The Android QR code shown by Codex Desktop decodes only to:
com.openai.chat://codex/open

I also checked Android network traffic with a CONNECT proxy. The ChatGPT app connects to OpenAI hosts including:

• android.chat.openai.com:443
• ws.chatgpt.com:443
• ab.chatgpt.com:443

So the phone appears to reach OpenAI servers, but the remote control connection still fails.