How to Get the New iPhone Update: A Complete Guide

Keeping your iPhone up to date is one of the simplest things you can do to improve performance, patch security vulnerabilities, and access new features. But the process isn't always as straightforward as it sounds — different devices, storage situations, and network conditions all affect how smoothly an update goes.

What iPhone Updates Actually Are

Apple releases iOS updates on a rolling basis throughout the year. These fall into a few distinct categories:

  • Major updates (e.g., iOS 17 → iOS 18): Released annually, usually in September. These introduce new features, redesigned apps, and sometimes drop support for older hardware.
  • Point updates (e.g., iOS 18.1 → iOS 18.2): Released every few weeks. These add incremental features and refinements.
  • Security patches (e.g., iOS 18.1.1): Smaller, faster updates focused on fixing vulnerabilities. Apple sometimes releases these outside the normal schedule.

Understanding which type of update is available helps you decide how urgently to install it and what to expect from the process.

The Standard Way to Update Your iPhone 📱

The most common method is updating directly on the device, sometimes called an OTA (over-the-air) update.

Steps:

  1. Open the Settings app
  2. Tap General
  3. Tap Software Update
  4. If an update is available, tap Download and Install
  5. Enter your passcode if prompted
  6. Agree to Apple's terms and let the process run

Your iPhone will download the update, verify it, and restart to apply it. Depending on your internet connection and the size of the update, this can take anywhere from a few minutes to over an hour.

What you need before starting:

  • At least 50% battery, or plug in your device
  • A Wi-Fi connection (iOS won't download major updates over cellular by default)
  • Enough free storage space — typically 2–5 GB for major updates, less for patches

Updating Through a Computer

If the OTA method isn't working — perhaps due to low storage or a software glitch — you can update through Finder (on macOS Catalina and later) or iTunes (on Windows or older Macs).

Steps:

  1. Connect your iPhone to your computer with a USB cable
  2. Open Finder or iTunes
  3. Select your device from the sidebar
  4. Click Check for Update
  5. Click Download and Update

This method downloads the full update file to your computer first, which can be useful if your iPhone doesn't have enough room to stage the download locally. It also tends to be more reliable when an iPhone is experiencing software issues.

Automatic Updates: Set It and Forget It

If you'd rather not manually check for updates, iOS has a built-in Automatic Updates feature.

To enable it:

  1. Go to Settings → General → Software Update
  2. Tap Automatic Updates
  3. Toggle on Download iOS Updates and Install iOS Updates

With this enabled, your iPhone will typically download and install updates overnight while charging and connected to Wi-Fi. You'll see a notification in the morning confirming what was installed. 🔄

One nuance: major iOS updates don't always install automatically right away. Apple often stages rollouts over weeks, and automatic installation of a new major version may be delayed compared to manually initiating it yourself.

Why You Might Not See the Update Yet

Even if an update has been publicly announced, you may not see it immediately. Apple uses phased rollouts, gradually releasing updates to a percentage of users over days or weeks. This helps Apple catch widespread bugs before they reach everyone.

Other reasons an update might not appear:

  • Your device isn't compatible with the new iOS version
  • You're already on the latest version available for your hardware
  • There's a temporary server-side delay on Apple's end
  • A previous failed update is cached and needs to be cleared

If you're not seeing an expected update, waiting 24–48 hours and checking again often resolves it. You can also try going to Settings → General → Software Update → Automatic Updates and toggling the settings off and back on to prompt a fresh check.

Device Compatibility Matters More Than You Think

Not every iPhone can run the latest iOS version. Apple typically supports iPhones going back five to seven years, but this varies by release.

iOS Version (General Era)Approximate Oldest Supported Device
iOS 16iPhone 8 and later
iOS 17iPhone XS and later
iOS 18iPhone XS and later

If your device isn't on the supported list, your iPhone will simply stop showing updates beyond its maximum supported version. You'll still receive security patches for some time after, but major feature updates won't be available.

Storage and Space: The Hidden Bottleneck

One of the most common reasons an update fails silently is insufficient storage. iOS needs room not just to store the update file, but to unpack and apply it — which temporarily requires more space than the final installed size.

If your iPhone shows low storage:

  • Delete apps you no longer use
  • Offload photos to iCloud or a computer
  • Clear app caches through individual app settings
  • Use Settings → General → iPhone Storage to see what's taking up space

After freeing space, return to Software Update and try again.

The Variables That Determine Your Experience

How smoothly an update goes — and which update you're eligible for — depends on a combination of factors that are specific to your situation:

  • Your iPhone model determines the ceiling on which iOS version you can run
  • Your current iOS version affects how large the update delta is
  • Available storage determines whether OTA updating is even possible
  • Network speed and stability affect download time and failure risk
  • Whether you've set up iCloud or a local backup determines how safe an update attempt is

Someone running an iPhone 15 on the latest iOS with 30 GB free will have a fundamentally different update experience than someone on an iPhone XS with 2 GB of space and an unstable Wi-Fi connection. The mechanics are the same, but the variables in your own setup are what shape the outcome.