Here's a download link for iOS 11.2 .IPSW firmware below which then you can manually install via iTunes at any time without any problem.
Apple releases iOS 11.2 final for all public with many more new features and bug fixes iPhone crashing at 12:15 am, improved battery life, offline siri, improvement in maps, improved Animojis on iPhone X, great battery life, iTunes tab is slightly changed, fast wireless charging, offline Siri(invoke Siri even without no internet connection), improvements in Maps.
Likewise other bug fixes and improvements in iOS 11.2 are control center toggles, lag input in Calculator, keyboard, refined animation, faster & lot more features new Sirikit for HomePod, notifications restrictions in tv app, emojis, return of 3D touch app switcher, some changes in Accessibility and more.
How to install iOS 11.2 using iPSW file?
iOS 11.2 is available for download and install on iPhone or iPad or iPod Touch via OTA software update or using iTunes.
With iOS 11.2 IPSW file download, you can easily install iOS 11.2 on iPhone/iPad using iTunes without any issues.
Here's a direct link for downloading iOS 11.2 IPSW file for iPhone/iPad or iPod touch.
Download iOS 11.2 .IPSW for iPhone
iOS 11.2 (iPhone 5s GSM): iPhone_4.0_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 5s GSM+CDMA): iPhone_4.0_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 6 Plus): iPhone_5.5_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 6): iPhone_4.7_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 6s): iPhone_4.7_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 6s Plus): iPhone_5.5_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone SE): iPhone_4.0_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 7 GSM+CDMA): iPhone_4.7_P3_11.0_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 7 Plus GSM+CDMA): iPhone_5.5_P3_11.0_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 7 GSM): iPhone_4.7_P3_11.0_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 7 Plus GSM): iPhone_5.5_P3_11.0_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 8 GSM+CDMA): iPhone_4.7_P3_11.0_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 8 Plus GSM+CDMA): iPhone_5.5_P3_11.0_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 8 GSM): iPhone_4.7_P3_11.0_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone 8 Plus GSM): iPhone_5.5_P3_11.0_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone X GSM+CDMA): iPhone10,6_11.2_15C114_Restore.ipsw
iOS 11.2 (iPhone X GSM): iPhone10,6_11.2_15C114_Restore.ipsw
Download iOS 11.2 .IPSW for iPad
iOS 11.2 (iPad Air Wi-Fi): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air Cellular): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 2 Wi-Fi): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 2 Cellular): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air China): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 2 China): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 3 Wi-Fi): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 3 Cellular): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 3 China): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air 2 Wi-Fi): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air 2 Cellular): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 4 Wi-Fi): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 4 Cellular): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro Wi-Fi): iPadPro_12.9_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro Cellular): iPadPro_12.9_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 9.7 Wi-Fi): iPadPro_9.7_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 9.7 Cellular): iPadPro_9.7_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad 5 Wi-Fi): iPad_64bit_TouchID_ASTC_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad 5 Cellular): iPad_64bit_TouchID_ASTC_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 12.9 Wi-Fi 2nd Gen): iPad_Pro_HFR_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 12.9 Cellular 2nd Gen): iPad_Pro_HFR_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 10.5 Wi-Fi): iPad_Pro_HFR_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 10.5 Cellular): iPad_Pro_HFR_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air Wi-Fi): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air Cellular): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 2 Wi-Fi): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 2 Cellular): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air China): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 2 China): iPad_64bit_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 3 Wi-Fi): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 3 Cellular): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 3 China): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air 2 Wi-Fi): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Air 2 Cellular): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 4 Wi-Fi): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Mini 4 Cellular): iPad_64bit_TouchID_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro Wi-Fi): iPadPro_12.9_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro Cellular): iPadPro_12.9_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 9.7 Wi-Fi): iPadPro_9.7_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 9.7 Cellular): iPadPro_9.7_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad 5 Wi-Fi): iPad_64bit_TouchID_ASTC_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad 5 Cellular): iPad_64bit_TouchID_ASTC_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 12.9 Wi-Fi 2nd Gen): iPad_Pro_HFR_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 12.9 Cellular 2nd Gen): iPad_Pro_HFR_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 10.5 Wi-Fi): iPad_Pro_HFR_11.2_15C114_Restore.ipsw
iOS 11.2 (iPad Pro 10.5 Cellular): iPad_Pro_HFR_11.2_15C114_Restore.ipsw
Download iOS 11.2 .IPSW for iPod Touch
iOS 11.2 (iPod touch 6G): iPodtouch_11.2_15C114_Restore.ipsw
How to install iOS 11.2 on iPhone
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iOS 11.2 (iPod touch 6G): iPodtouch_11.2_15C114_Restore.ipsw
How to install iOS 11.2 on iPhone
For more updates, stay with us and don't forget to follow iMangoss on Social Networks Facebook, Twitter, Google+, or RSS and also find us on Apple News if you haven’t already.