iOS 15.4 Is Here: Unlock Your iPhone With a Mask On, Hear Siri’s New VoiceApple’s latest iPhone software update also offers new emojis, some enhanced AirTag antistalking warnings and more.#Joanna Stern#iOS#iOS 15·wsj.com·Mar 15, 2022iOS 15.4 Is Here: Unlock Your iPhone With a Mask On, Hear Siri’s New Voice