You can use Siri on an iPhone XR, iPhone XS, or iPhone X in two ways: either with the Side button, or through a "Hey Siri" voice command.

The iOS 18.4 update for the iPhone could be landing next week, and with it the newest updates to Apple Intelligence. That includes the updated Siri, which is marked by a rainbow of pulsing colors ...

The Announce Calls feature on iPhone was introduced with iOS 10, and when enabled Siri will "speak" the name of the contact calling you.