If your iPhone froze during an update, you can try force restarting it, also known as hard resetting.
This technique is known to solve the issue and can be used to cure other iOS issues as well.
To force restart your iPhone, press and quickly release the volume up button, then press and quickly release the volume down button, and finally press and hold the side button until you see the Apple logo.
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Force Restarting, better known as Hard Reset, your iPhone solves the problem if your iPhone froze during the update. You may use this technique to cure other iOS issues as well. Forcefully shutting off an iPhone might seem like a simple remedy, but it really works.
iPhone Frozen During iOS Update? The Real Fix!- Dr.Fone
When you're experiencing the errors of iPhone frozen after iOS update , go over the troubleshooting methods one-by-one. 1. Force restart. 2. Enter recovery mode. 3. Apply iOS system repairing software…
iPhone Frozen After iOS Update? The Fix - AppGeeker