iOS 11.4 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
Use your voice to control AirPlay 2-enabled speakers with Siri from your iPhone or iPad, HomePod, or Apple TV
Take a call or play a game on your iPhone or iPad without interrupting playback on your AirPlay 2-enabled speakers

HomePod stereo pair

This update supports setting up your HomePod stereo pair using your iPhone or iPad
HomePod pair automatically senses its location in the room and balances the sound based on the speakers' locations
Advanced beamforming provides wider soundstage than traditional stereo pair
HomePod will automatically update to support stereo pairs, unless auto updates are disabled in the Home app

Messages in iCloud

Store your messages, photos, and other attachments in iCloud and free up space on your devices
All your messages appear when you sign into a new device with the same iMessage account
When you delete messages and conversations they are instantly removed from all your devices
To turn on Messages in iCloud, enable Messages in iCloud settings (Settings > [your name] > iCloud)
Your conversations continue to be end-to-end encrypted

Other improvements and fixes

Enables teachers to assign their students reading activities in iBooks using the Schoolwork app
Fixes an issue where certain character sequences could cause Messages to crash
Addresses a Messages issue that could cause some messages to appear out of order
Addresses an issue that could prevent logging in or accessing files on Google Drive, Google Docs and Gmail in Safari
Fixes an issue that could prevent data syncing in Health
Fixes an issue that could prevent users from changing what apps can access Health data
Resolves an issue that could cause an app to appear in an incorrect location on the Home screen
Fixes an issue where CarPlay audio could become distorted
Fixes an issue where selecting music from your iPhone could fail when playing music over Bluetooth or when connected to USB on some vehicles

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222

Filename:	iPhone_5.5_11.4_15F79_Restore.ipsw
Release Date:	29th May 2018
Upload Date:	18th May 2018
File size:	2.72 GB
Identifier:	iPhone7,1
MD5sum:	dd54b6585226b3bdf63638de16e045fc
SHA1sum:	2bb3f264370c24446289eb033094323957037cca

Download iOS 11.4 for iPhone 6+

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