iPhone 7 Plus update issue

Q About a month ago I tried to update my iPhone 7 Plus to iOS version 12.1.2, but it is still stuck on “estimating time remaining”. I tried to force restart the phone but the problem persists.

Tashi

The best way to solve this problem is to connect your iPhone to a Windows PC that has the latest version of iTunes installed. Launch iTunes and connect your iPhone to the computer. Switch off the iPhone by pressing the power button and then swiping to shut it down. Now you have to put the phone into DFU (device firmware update) mode.