Apple releases iOS 11.4 with Messages in iCloud, HomePod stereo pairing and multi-room audio with AirPlay 2, and more Apple today released iOS 11.4 which includes AirPlay 2 multi-room audio, support for HomePod stereo pairs, and Messages in iCloud. This update also includes bug fixes and improvements.AirPlay 2 • Control your home audio system and AirPlay 2-enabled speakers throughout your house • Play music at the same time on multiple AirPlay 2-enabled speakers in your house, all in sync • Control AirPlay 2-enabled speakers from Control Center, the Lock screen, or AirPlay controls within apps on your iPhone or iPad...