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9 Ways to Fix iOS 15 Download and Install Button Grayed Out

DoubtUser Concern

“I was trying to update my iPhone 12 to latest iOS 15 version but the download and install option in 'software update' was greyed out. How can I fix this?”

Upgrading iPhone to the latest iOS 15 brings many newest features and security improvements. However, some users have experienced issue with the Download and Install button grayed out and they're unable to do the iOS 15 update. Before getting yourself into a complete flap, the easy and useful tips below will get you out of the crap.

download and install button greyed out

1. Check Internet Connectivity

The Download and Install button may be grayed out if your iPhone is connected with cellular data or a poor WiFi. Thus, you'd better check your iPhone's internet connectivity and ensure the device is connected with a strong Wi-Fi network before upgrading to iOS 15. Here's what you need to do:

1.1 Use Wi-Fi Instead of Cellular Data

If your iPhone is on cellular connection when upgrading to iOS 15, you should see a notification "This update requires a Wi-Fi network connection to download". To switch to a Wi-Fi connection, just go to Settings > Wi-Fi and toggle the Wi-Fi on.

Once you are connected to a Wi-Fi network, go to Software Update and now the Download and Install option should work as normal.

use wifi instead of cellular

1.2 Turn Off WiFi and Turn It Back On

If you're connected to WiFi but the Download and Install button is still greyed out, poor Wi-Fi connectivity is to blame. You can open the Safari app and open some websites to test the internet. If the internet is not running properly, you can try to turn off WiFi and then turn it back on.

turn off and turn on wifi

1.3 Disable Wi-Fi Assist

If Wi-Fi Assist is turned on, your iPhone will automatically switch to cellular data when the Wi-Fi network is poor. In this situation, you shouldgo to Settings > Cellular Data > Wi-Fi Assist and turn it off.

turn off wifi assist

1.4 Reset Network Settings

Another workaround is to reset network settings when the Download and Install button is still greyed out. After that, all relevant network settings on your iPhone will be reset to factory defaults.

To do that, open the Settings app and head to "General". Thentap on "Reset > Reset Network Settings". Enter your device's passcode when prompted and confirm the action.

reset network settings

1.5 Switch to Another iPhone

If there is still the problem of "iOS 15 Download and Install button grayed out" after resetting network settings, you can try to perform the iOS 15 update on a different iPhone to check if the issue occurs due to the network issue.

2. Check iPhone Storage Space

Large storage will be occupied to install a new iOS update. If there is not enough storage available on your iPhone, the Download and Install button may be grayed out during the iOS 15 update. So another constructive suggestion we offer to you is to check your iPhone storage space. Here're how to do that:

Go to Settings > General > iPhone Storage and you will see the remaining storage on the device. It is recommended to reserve at least 1GB before upgrading.

check iphone storage

3. Check Battery Percetage on iPhone

In general, when updating to the latest version of the iOS, the power is one of the key factors that cannot be ignored. If you do not follow the instructions, it may cause great potential damage to your iOS device. The iPhone power is so important that Apple itself will not allow users to do the iOS 15 update when the device has less than 50% of battery charge remaining.

So before updating, make sure that the device has enough power, or it's better to plug the device directly into the power supply using original Apple lightning cable.

check iphone battery percentage

4. Download and Install iOS 15 with iTunes

The steps described above show you basic tricks to get rid of the "Download and Install" button grayed out issue. Some users may still find this issue when they intend to install iOS 15. If so, use iTunes instead.

In some cases, iTunes is a great alternative to update iOS. For example,there is not enough storage space on the iPhone, there is no Wi-Fi around to do the iOS update, etc. Not much to say, let's show you how to use iTunes to download and install iOS 15 on your iPhone.

Preparation before iOS 15 update:

  • A Windows or Mac OSX computer and USB cable.
  • The latest version of iTunes.

Download and Install iOS 15 with iTunes:

  1. Lauch iTunes on your computer and ensure it is upgraded to the latest version.

  2. Connect your iPhone to the computer via USB cable. Unlock the device and tap on "Trust" on its screen when prompted.

  3. In the upper left corner, the device icon will appear. Click on it and go to the Summary page.

  4. On the summary interface, click on "Check for Update" and you will have your iPhone updated to the latest iOS 15.

check for update

5. Update to iOS 15 with Reliable 3rd-Party Tool

Now you shall know how to download and install iOS 15 with iTunes. But you may encounter different kinds of issues when using iTunes for the update. To avoid the problems, you can use FoneGeek iOS System Recovery to execute the whole update process without any interruption. No data will get lost after the iOS 15 upgrade. Besides iOS update, it can also fix various iOS issues arise during or after the update. This program stands out in this industry for its perfect performance.


Step 1. Get this program downloaded to your computer, then install and launch it. From the main interface, select "Standard Mode" to proceed.

choose repair mode

Step 2. Connect your iPhone to the computer using lightning cable and click on "Next". The latest firmware package will be listed for you to download.

connect ios device

Step 3.Click on "Download" and follow the on-screen steps. When the whole process is finished, the iOS 15 firmware will be downloaded and installed on your iPhone.

download firmware

Write In the End

Hope you have resolved the Download and Install button grayed out issue and have the newest iOS 15 installed on your iPhone. Before upgrading to iOS 15, it is recommend to back up your iPhone to avoid unexpected data loss. Instead of using iTunes or iCloud, you can try another reliable tool developed by FoneGeek - Free iOS Backup & Restore. Using it, you can flexibly backup WhatsApp, contacts, photos, messages, etc. on your iPhone and selectively restore data without overwriting the existing files on the device.


Fay J. Melton
Wednesday on Aug 14, 2019, 22:27:41 GMT / Post By Fay J. Melton to iOS 15

Fay J. Melton has explored the area of technology and software for more than 5 years and he is enthusiastic about helping users solve various technology issues.

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