How to Update iOS on Your iPhone or iPad: A Step-by-Step Guide 📱
iOS updates bring security fixes, new features, and performance improvements to your Apple devices. Whether you're using an iPhone or iPad, the update process is straightforward—but a few variables affect which devices can receive updates and how smoothly the process goes. This guide walks you through what happens during an update and how to do it safely.
What Happens When You Update iOS
An iOS update is a software refresh that Apple releases periodically. Each update includes security patches (fixes for potential vulnerabilities), bug fixes, and sometimes new capabilities or design changes. Updates are free and install directly on your device.
Not every device receives every update. Apple typically supports the last several generations of iPhones and iPads, but older models may reach a point where they no longer receive new versions. Checking whether your specific device is compatible with the latest iOS version is the first step.
Before You Update: What You Should Know
Backup your device. Before any update, connect to your computer or use iCloud to create a backup. If something goes wrong (though it rarely does), you'll have a copy of your data. Go to Settings > [Your Name] > iCloud > iCloud Backup to verify cloud backup is on, or use a Mac or PC with iTunes or Finder to create a local backup.
Charge your battery. Plug in your device and let it charge to at least 50%, preferably higher. An update interrupted by a low battery can cause problems.
Connect to Wi-Fi. Updates are large files. Use a reliable, stable Wi-Fi network rather than cellular data.
Allow time. The process typically takes 15–30 minutes from start to finish, though it varies by device age and update size. Don't plan an update when you need your device immediately.
The Two Ways to Update iOS
Over-the-Air (OTA) Updates
This is the easiest method for most people. Your device downloads and installs the update directly without needing a computer.
- Go to Settings > General > Software Update
- Your device will check for available updates
- If an update is available, tap Download and Install
- Enter your passcode if prompted
- Agree to the terms
- Your device will restart and complete the installation
Your phone or tablet may restart several times. You'll see progress bars and Apple logos. This is normal. Don't force-close or unplug during this time.
Computer-Based Updates (macOS/Windows)
If over-the-air updates fail or you prefer more control, you can update via a computer.
- Connect your device to a Mac (using Finder) or Windows PC (using iTunes)
- Open Finder or iTunes and locate your device
- Select Check for Updates or look for available software
- Click Update (not Restore—restore erases your device)
- Agree to terms and let the process complete
This method can be more stable for problematic updates, and it gives you a full backup as part of the process.
What Slows Down or Blocks Updates
Several factors influence how smoothly an update goes:
| Factor | Impact |
|---|---|
| Device age | Older devices may take longer; very old devices may not be compatible |
| Available storage | Updates require temporary free space; a full device may fail |
| Wi-Fi quality | Weak or unstable connection can interrupt downloads |
| Battery level | Low battery during install can cause failure |
| Background activity | Lots of apps running may slow the process |
| iOS version gap | Large jumps between versions take longer than minor updates |
After the Update: Verifying It Worked
Once your device restarts and you're back at your home screen, verify the update completed:
- Go to Settings > General > About
- Look at the Software Version line
- It should show the latest version number Apple released
If you're still seeing an older version, the update didn't finish. Try again from Settings > General > Software Update.
Troubleshooting Common Issues
"Not enough storage" — You don't need to have gigabytes free, but you do need some temporary space. Delete old photos, videos, or apps you don't use, then try again.
Download keeps failing — Move closer to your router, or try a different Wi-Fi network. If it keeps failing, try the computer-based method.
Update stuck on progress bar — Wait at least an hour. If nothing changes, force restart (the key combination varies by model; search your device model plus "force restart") and try again.
Battery died mid-update — Charge the device and turn it back on. iOS is designed to recover from interruptions, but you may need to try the update again.
Important Distinctions Between Types of Updates
Major updates (like iOS 17 to iOS 18) are larger downloads and may take longer. They often bring visible changes to how your device looks and works.
Minor updates (like iOS 17.3 to 17.4) are typically smaller and faster. These usually focus on security and bug fixes.
Security updates sometimes install without major version changes. These are especially important and worth doing promptly.
Key Variables That Affect Your Update Experience
Your specific outcome depends on your device's age, how much storage you have available, the quality of your internet connection, and whether you can keep your device plugged in and undisturbed for 20–30 minutes. Someone updating a newer iPad on fast home Wi-Fi will have a different experience than someone updating an older iPhone on a spotty network at work.
The process itself is the same for everyone—the variables are just in the speed and reliability of execution. If you follow the basic steps (backup, charge, strong Wi-Fi, patience), updates work smoothly for the vast majority of people.
