iOS 17.4 update stuck on 'Verifying Update' — fix in 2 minutes

You're updating your iPhone and it's been stuck on "Verifying Update" for 20 minutes. I've seen this hundreds of times. It's not broken — the update file got corrupted mid-download or your Wi-Fi dropped the ball. Here's how to get past it without restoring your phone.

The main fix: force restart your iPhone

This clears the verification process and kicks it back to the download step. No data lost. Here's the sequence for iPhones with Face ID (iPhone X and newer):

1. Press and release the Volume Up button quickly.
2. Press and release the Volume Down button quickly.
3. Press and hold the Side button (the power/sleep button on the right). Keep holding it even after the "Slide to power off" slider appears. Ignore the slider.
4. Keep holding the Side button until the screen goes black and then you see the Apple logo. This takes about 10-15 seconds after the slider appears. Don't let go early.
5. Release the Side button when you see the Apple logo. Your phone will boot up normally.

After the restart, go to Settings > General > Software Update. You should see "iOS 17.4" ready to download again. Tap "Download and Install" and this time it should pass verification within 30 seconds. If it doesn't, move to the next step.

Plan B: delete the corrupted update file

Sometimes the update file is already downloaded but damaged. Force restart alone won't fix that — you need to force the phone to re-download it. Here's how:

1. Go to Settings > General > iPhone Storage. Wait for the list of apps to load — on older iPhones this can take 20 seconds.
2. Scroll down until you see an entry labeled "iOS 17.4" or "iOS 18.0" or whatever version you're trying to install. It's usually at the bottom of the list, right above "System Data." The file size will be around 5-7 GB.
3. Tap on it, then tap Delete Update. Confirm by tapping "Delete Update" again in the pop-up.
4. Go back to Settings > General > Software Update. The phone will check for updates again. It should find the same update and start downloading a fresh copy.

One gotcha: if your iPhone Storage doesn't show the update file, it means the download never completed. In that case just force restart and try again from Software Update.

Why this happens

iOS verifies the update file against Apple's servers before it installs. That check involves cryptographic signatures — if the file is even one bit off, the verification loops forever. The usual causes are:

• Your Wi-Fi dropped during the download. iOS keeps the partial file and tries to verify it anyway. It fails silently.
• Your iPhone's time is wrong. The verification uses timestamps. If your date and time aren't set to automatic, the signatures won't match. Check Settings > General > Date & Time and make sure "Set Automatically" is on.
• Your storage is almost full. iOS needs free space to unpack the update. If you're under 3 GB free, the verification hits a wall. Free up space before retrying.

Less common variations

These don't happen often, but when they do, the standard fix doesn't work.

The update loops between "Verifying" and "Downloading"

If the progress bar goes back and forth between these two states, your network is unstable. Switch from Wi-Fi to cellular (or vice versa). Or use a different Wi-Fi network — sometimes the router's firewall blocks Apple's update servers. Try turning off your router for 30 seconds and plugging it back in.

The update gets stuck at "Preparing Update" instead

That's a different beast. "Preparing Update" means the phone is trying to copy the update to a hidden partition. If it hangs there, your storage is fragmented or you don't have enough free space. You need at least 10 GB free for a major iOS update. Head to Settings > General > iPhone Storage and offload unused apps: tap an app, tap "Offload App." This keeps your data but removes the app binary. You can reinstall later.

The update gets stuck with no error message on an iPhone with a broken Home button

Older iPhones (iPhone 8 and earlier) need a different force restart. For iPhone 7 series: press and hold both the Volume Down button and the Side button until the Apple logo appears. For iPhone 6s and earlier: press and hold both the Home button and the Top (or Side) button until the Apple logo appears. If your Home button is broken, use the accessibility shortcut: triple-click the Side button to bring up AssistiveTouch, then use the on-screen Home button to restart the standard way.

Prevention — stop it from happening again

Three things will keep you out of this mess:

1. Always update on a stable Wi-Fi network. Don't use public Wi-Fi or a hotspot. Your home network with the router in the same room is best. If you must use cellular, make sure you have strong 5G signal — LTE can stall on large downloads.
2. Keep at least 10 GB free. iOS 17.4 takes about 7 GB to download and needs another 3 GB to unpack. Check your storage before tapping "Download and Install."
3. Set your date and time to automatic. If you travel frequently and manually change the time, turn "Set Automatically" back on before updating. I've seen this trip up dozens of people who flew across time zones and forgot.

If the update still fails after trying all of this, you might have a hardware issue—specifically a failing NAND chip. That's rare (I've seen it maybe once a year). In that case, back up your phone to iCloud or a computer and take it to an Apple Store. But 99% of the time, the force restart or delete-update-file trick gets it done.