With iOS 10, iPhone users can now choose to have their devices verbally announce the name or number when an incoming call comes in — an especially handy feature for hands-free situations where you aren’t able to easily glance at your iPhone when it rings.
The new settings can be found in the Phone section in the Settings app, under Announce Calls, and you can choose whether to always have incoming calls announced, or only have your iPhone announce calls when you have headphones plugged in or are connected to a vehicle via Bluetooth.