installing update
how long does " install now" show. It appears to be installing, but seems to be taking a long time. What is normal on a software update during setup of a new phone
iPhone 12 Pro Max
Over-the-air iOS update depends on the internet speed, the iOS version, and the existing iOS versions. At 15 Mbps for me, it took 30-40 mins to update iOS 14.7 from iOS 14.7.1
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.