The chances of ever being able to replace Siri as the default voice assistant on your iPhone are basically zero. But there's a way to quickly access Bing Chat on the iPhone that you probably haven't thought about.
Like Siri, you can trigger this from anywhere on the iPhone, whatever app you're inside at the time. It doesn't go straight into Bing Chat, though, there's going to be an additional tap, but I can't think of a quicker way.
