If you’re trying to update your iPhone to iOS 18.4 but keep running into issues, don’t worry – you are not alone. In this detailed guide, I’m going to walk you through the best fixes to resolve the iOS 18.4 update failed problem and help your iPhone install the latest update. Read on…
Fix iOS 18.4 Update Failed on iPhone and iPad
From the poor internet connection to the cluttered storage to the jam-packed servers, there are multiple reasons why the latest iOS 18 update is unable to install on your iPhone.
1. Check Internet Connection
Be warned that a stable and fast internet connection is crucial for downloading and installing iOS updates. Therefore, make sure you’re connected to a strong Wi-Fi network. If possible, restart your router and reconnect your device.
2. Free Up Storage Space
It’s important to reiterate that iOS updates require enough free storage to install.
- So, go to Settings > General > iPhone Storage and check if you have sufficient space. If needed, delete unnecessary apps, photos, or videos.

3. Restart Your iPhone
Many a time, a simple restart can fix minor update issues.
- To get it done, press and hold the power button + volume up/down button simultaneously > slide to power off.
- Turn your iPhone back on after a few seconds and try updating again.

4. Reset Network Settings
If network issues persist on your iPhone, preventing you from downloading iOS 18.4, resetting your network settings might help.
- On your iOS device, navigate to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.

- Note that it will remove saved Wi-Fi networks and VPN settings, so reconnect to Wi-Fi before trying the update again.
5. Check Apple Servers
If Apple’s servers are down, the iOS update might fail. Hence, it would be apt to visit Apple’s System Status page and check if there are any ongoing issues with iOS updates. If there is a server issue, wait and try again later.
6. Delete and Reinstall the Update
Do you know that a corrupted update file can also cause installation failures? Therefore, get rid of the failed update and start afresh.
- To do so, dive into the Settings > General > iPhone Storage, find the iOS 18.4 update file, and delete it.
- After that, try to redownload the update from Settings > General > Software Update.
7. Use a Computer to Update
If over-the-air updates are still not working, try updating via a Mac or PC.
- Connect your iPhone using a Lightning or USB-C cable.
- After that, open Finder (Mac) or iTunes (Windows).
- Next, check for updates and proceed to install the latest update by following the instructions.
And that’s it! Hopefully, one of these fixes helped you successfully update to iOS 18.4. If you found this article helpful, be sure to share your feedback and the tips that have enabled the update to install on your device.