Open the ChatGPT app on your mobile device or go to the ChatGPT website in your mobile browser
Sign in with your account
Tap the message box
Type your question or request
Tap send
Read the response
Tap the microphone or voice input option if available to speak instead of typing
Use follow-up messages to continue the conversation
Copy, share, or save the response if needed
Log out when finished if you are using a shared device