Updated on 2025-04-07 / iPhone Tips
If you have just upgraded to iOS 18/18.4 or iPados 18/18.4, you are probably excited to try all the new features from this update. But you face the error "iOS 18/18.4 is temporarily unavailable", which can really spoil your fun. If you are trying to update your iPhone, restore a backup, or simply make your device work properly, this error can be annoying and make you feel stuck. But don't worry, you are not alone, and there are simple fixes that will help you fix this problem.
In this guide, we show you the easy steps to quickly fix it so you can enjoy everything iOS 18/18.4 or iPados 18/18.4 has to offer again.
Part 1: Why does the iPhone say temporarily unavailable?
The "ios 18 is temporarily unavailable. try again later" error typically occurs due to overloaded Apple servers during peak update times. When too many users try to update at once, the servers may struggle to handle the traffic, leading to temporary unavailability. Additionally, issues like poor internet connection, ongoing server maintenance, or compatibility problems with your device can also trigger this error.
Part 2: How to Update to iOS 18/18.4 Smoothly and Avoid Errors?
Upgrading to iOS/iPados 18 is exciting, but things don't always go as smoothly as you'd like. Instead of dealing with annoying bugs like "iphone unavailable try again 5 minutes ios 18", you can make things easier with Reiboot. This trusted tool helps fix problems with iOS, ensuring that your upgrade to iOS 18/18.4 goes smoothly. If you are dealing with minor crashes or major problems, ReiBoot is here to help.
Key Features of Reiboot
- Safe iOS/iPadOS 18 downgrade/upgrade without jailbreak or iTunes
- One-click entry and exit from Recovery Mode
- Fix over 150 system issues, including Apple logo and black screen problems, without data loss.
- Reset devices without requiring a passcode, iTunes, or Finder
- Permanently erase data before selling or trading in the device
- Resolve common iPhone and iTunes errors like 4013 and 1110
How to Use ReiBoot for iOS/iPados 18 Update?
Step 1: Download and install ReiBoot on your computer and connect your iPhone or iPad to the computer using a USB cable.
Step 2: Launch the Reiboot software on your computer.
Step 3: Once the devices are connected, click “iOS Upgrade” at the bottom left of the panel.
Step 4: No matter beta version or final version, you should choose "Upgrade" mode. Then, click the button below.
Step 5: ReiBoot will detect your iOS version automatically and display the upgradable iOS 18/18.4 firmware. Click “Download” to get the package.
Step 6: Once the firmware package is downloaded on your computer, you can click 'Initiating Upgrade' to update iOS. Then the program starts to update iOS/iPados 18.
Step 7: When the upgrade is completed, you will see the completed page and your devices will be the newest version.
Part 3: How to Fix the "iOS 18/18.4 is Temporarily Unavailable" Issue
Method 1: Check Apple’s System Status
When your iPhone displays the message "iphone unavailable try again 15 minutes ios 18," the problem may be with the Apple servers, not your device. Apple provides a System Status page to let users know about any ongoing issues with their services. Here's how you can use this method:
Step 1: Go to the Apple System Status page.
Step 2: Look for any reported issues with iOS Software Updates or related services.
Step 3: If there are issues, wait until Apple resolves them.
Step 4: After the status shows everything is working, try updating your device again.
Method 2: Restart Your iPhone
A force restart can resolve minor software glitches that can cause the software update temporarily unavailable iPhone iOS 18/18.4 error. To restart your iPhone:
Step 1: You have to press and release the Volume Up button quickly, then the Volume Down button.
Step 2: After this, press and hold the Side button until the Apple logo emerges on the screen.
Step 3: Once your iPhone restarts, attempt to install iOS 18/18.4 again.
This simple reset can often fix issues and allow the installation to proceed smoothly.
Method 3: Verify Your Internet Connection
Sometimes internet connection problems can cause the message "iphone unavailable try again in 1 hour ios 18". Keeping your Internet connection stable can help solve these problems. Here's how to test your connection:
Step 1: Check your Wi-Fi or cellular signal to ensure it’s strong and stable.
Step 2: Restart your router or modem by unplugging it, waiting for a few seconds, and plugging it back in.
Step 3: Switch to a separate Wi-Fi network or use cellular data if available.
Step 4: Test your connection by opening a website or app to confirm it’s working.
Method 4: Free Up Storage Space
If your iPhone is low on storage, the update might fail during verification. Here’s how to free up space:
Step 1: Go to Settings > General > iPhone Storage.
Step 2: Find and remove unused apps, large media files, or other data to make room.
Step 3: Confirm that you have a few gigabytes of free storage before trying the update again.
Clearing out unnecessary files can help ensure a smooth update process.
Method 5: Reinstall iOS 18/18.4 via iTunes
If you're still having trouble, reinstalling iOS 18/18.4 through iTunes on your computer might help. Here’s how:
Step 1: Plug your iPhone into your computer and open iTunes (or Finder if you’re on macOS Catalina or later).
Step 2: Choose your device from the list and go to the Summary or General tab. Click "Check for Update" and follow the instructions to download and install the iOS 18/18.4.
Reinstalling via iTunes can often bypass verification issues and get your update back on track.
Conclusion
Facing the "iOS/iPados 18 is Temporarily Unavailable" issue can be annoying, especially when you're excited to try out new features. Luckily, these problems are often easy to fix. Simple steps like checking Apple's system status or freeing up some storage can quickly solve the issue. For an even smoother experience, you should try ReiBoot. It's a reliable tool that helps fix update errors, ensuring your device runs smoothly so you can enjoy everything iOS/iPados 18 has to offer without any hassle.