Fix iPhone Won’t Update iOS
You are trying to install the latest iOS, but it says "Unable to Check for Update," "Verifying Update" forever, or "Install Failed."
The Problem
This is usually due to a corrupted download file or lack of storage. Even if the update is 2GB, you need 10GB free to unpack it.
The Short Answer
You most likely downloaded a bad file. You must go into your storage settings, delete the update file, and download it again from scratch.
Quick Fixes
- Method 1: Delete & Re-Download (Best Fix)
- Method 2: Check Storage Space
- Method 3: Update via Computer
Related Fixes: Storage Full Fix, WiFi Issues
Method 1: Delete & Re-Download (Best Fix)
- Go to Settings > General > iPhone Storage.
- Scroll down until you see the iOS version (e.g., "iOS 19.1").
- Tap it and delete it.
- Restart your phone.
- Go back to Software Update and try again.
Method 2: Check Storage Space
You need way more space than you think.
- Check Settings > General > iPhone Storage.
- If you have less than 8-10GB free, delete videos or large games.
Method 3: Update via Computer
Computers bypass the storage requirement.
- Connect to iTunes/Finder.
- Click Update.
If Nothing Worked
Check your WiFi. Updates won't download over cellular unless 5G is active and allowed.
Check Also: Not Charging After Update
Common Questions
- Why does it say "Verifying Update"?
- It's checking with Apple's servers. If it takes >15 mins, force restart.