Updating
How long will it take my phone estimate before updating
Question marked as
Over-the-air updates depend on the internet speed, the iOS version, and the existing iOS versions. At 15 Mbps for me, it took approx 40 mins to update iOS 15.0 from iOS 15.1
iOS update through iTunes will depend again upon the internet speed, the new iOS version, and the existing iOS version and over and above the Storage of iPhone for backing up before the update.