If you skipped i OS 11.2, you'll get a few more patches with your i OS 11.4 update.
The i OS 11.4 update is a sizable download for all i Phone, i Pad, and i Pod touch models.
If you’re coming from i OS 11.3.1, the update is several hundred megabytes. If you skipped i OS 11.0, i OS 11.0.1, i OS 11.0.2, i OS 11.0.3, i OS 11.1, i OS 11.1.1, i OS 11.1.2, i OS 11.2, i OS 11.2.1, i OS 11.2.2, i OS 11.2.5, i OS 11.2.6, i OS 11.3, or i OS 11.3.1, you i OS 11.4 update will be much bigger.
While most of you should install the i OS 11.4 update today, others might benefit from waiting a few more hours, a few more days, or even a few weeks.i OS 11.4 is the company’s fourth, and perhaps, final milestone release for i OS 11.
And like all milestone upgrades, Apple’s latest software update delivers a collection of important features, fixes and security patches.
If the i OS 11.4 software update starts causing problems on your device, you’re on your own until Apple rolls out the next version of i OS 11. Apple’s signing off on one i OS update, i OS 11.3.1, which means you can downgrade to it if i OS 11.4 starts causing too much trouble.
Unfortunately, you can’t downgrade to anything older than i OS 11.3.1.We're waiting on Apple to release the exact nature of the patches and we'll relay that information once it becomes available.i OS 11.4 also reportedly comes with a USB Restricted Mode that disables the Lightning port on your i Phone or i Pad if a device hasn't been unlocked or connected to a computer using a passcode within the last week.Anyone can download and install it right now by either downloading the IPSW file and installing it with i Tunes or updating over the air on your device after installing the OTA profile below.For instructions on how to install i OS 11 beta on your i Phone, i Pod touch or i Pad without having a paid developer account or UDID activation click here.If you’re on the fence about upgrading your i Phone, i Pad or i Pod touch to the latest version of i OS, allow us to walk you through the best reasons to, and not to, install i OS 11.4 right now.