Here you can select all the ios 11.2 iPSW files you need to install on your iOS Device.
The latest ios firmware ipsw files are given and you can download any beta version of the software if needed. Please note that it is free and does not require a jailbreak, developer ID or a UDID .Just tap on the Download button and download will start.
Also the latest updated ios 11 beta ipsw files are updated regularly.
You can download ios 11.2 firmware ipsw file for iPhone and iPad.