https://wccftech.com/download-ios-114-ipsw-ota/

Apple’s latest software for mobile is out and here’s how you can download iOS 11.4 IPSW file, over the air (OTA) or just do a clean install if you like on your iPhone, iPad or iPod.

After a long and excruciating wait, the final version of iOS 11.4 is here with us. The two highlighting features of this release are without a doubt Messages in iCloud and AirPlay 2. But of course, apart from that this update adds other changes under the hood too. You can learn about them all by going to this link.