How to use ChatGPT as your iPhone’s Action Button assistant

Apple still doesn’t let users replace Siri as the default assistant on the iPhone, but there is a simple workaround that gives you instant access to ChatGPT through the Action button. If you have an iPhone 15 Pro or a newer Pro model, you can assign ChatGPT’s voice mode to the Action button and launch it with a single long press.

This turns the Action button into a shortcut to a faster, more conversational assistant that many users find more capable than Siri.