i OS 11.4 arrived on and includes Air Play 2, Home Pod stereo pairing (if you have a Home Pod), Messages in i Cloud, and support for the Class Kit framework.
It's also thought to include a "Restriced access" mode that shoudl make it harder to hack into an i Phone or i Pad without a password. Air Play 2 brings multi-room audio playback and better buffering.
We run through all the updates to i OS 11 in this article.
Essentially, tools like Gray Key (and whatever tools criminals may have at their fingertips) make it possible to hack into an i Phone via a box that is plugged into the lightning port on a i OS device.
The box disables the usual passcode-retry and re-entry delay strategies that would normally stop anyone from accessing a phone after a number of incorrect passcode entries.
i OS 11.4 also gives Siri on the Home Pod access to Calendars. At launch Siri on the Home Pod was unable to add events to a user's Calendar - despite Siri having access to that on the i Phone and Mac.
This new version of i OS 11 opens up i Cal calendars to Home Pod users.
If you're wondering whether you should install i OS 11, read this. There have been a series of issues with i OS 11, from the autocorrect bug that causes the word 'it' to be changed to a I. S, and a couple of text message bugs that could cause your i Phone to crash (more information here: How to avoid the malicious text message could crash your i Phone and Mac.) i OS 11.3 added new Animoji and more information about battery health - but also broke third-party i Phone 8 screens that had been used to replace smashed screens.
Apple has since issued an update to rectify this, although it warns i Phone users not to use "non-genuine replacement displays." The latest issues are a problem where repaired i Phone 8 screens are not working following the i OS 11.3 update, a Siri privacy bug, and a problem where text messages are appearing outside the bubble, read more about these issues with i OS 11 here.Air Play 2 is instrumental in allowing the Home Pod to play multi-room stereo - a feature that wasn't available at launch for that product.Air Play 2 will also allow for multi-room streaming via more than one Apple TV.It also fixes an issue that could cause i Messages to appear out of order and a glitch that could cause an app on the Home screen to appear in the wrong location.It also fixes the following, according to Apple: i OS 11.3.1 arrived on 25 April 2018, bringing with it a fix for i Phone 8 users whose screens became unresponsive after the i OS 11.3 update.The i OS 11.3 update rendered third-part screen replacements unresponsive.