How to install iOS 12 developer beta 3 to your iPhone and iPad

Apple is currently testing iOS 12 developer beta releases with users signed up to Apple’s Developer Program. Announced at WWDC 2018, along with macOS MojaveiOS 12 contains major performance improvements, updates to built-in apps, revamped notifications and much more. If you are interested in testing iOS 12, here is how you can install the developer beta on your iPhone or iPad.

iOS 12 developer beta

It goes without saying that a developer beta should not be installed on a non-test device. It might cause issues like data loss, battery drainage, heat up and other unexpected problems. Despite the stability and performance improvements in iOS 12, it is still a beta and many features do not work as expected. You might want to wait for iOS 12 public beta instead, which would have better stability than early developer betas.

Backup iOS device using iTunes and iCloud

Before we proceed, back up your iPhone, iPad or iPod touch via the following methods:

  • iTunes backup. Connect your iOS device to a Windows PC or Mac, with the latest version of iTunes to back it up. If you use Health and Activity apps, make sure you check the option ‘Encrypt iPhone backup’ to backup the data from these apps.
  • iCloud backup. Go to Settings > Apple ID > iCloud and look for the iCloud Backup option. Make sure that it is turned on, and tap on Back up now.

Using both these methods ensures that you have have a backup to restore to, in case of any issues during beta testing.

Download iOS 11.2 beta 3 from Apple Developer Center

To install iOS 12, you would need to register for a developer account at Apple’s Developer Center.The membership costs $99/year and grants you access to Apple’s developer tools, beta operating system releases and SDKs. Once you have created the account, follow the below steps to install the configuration profile on your iOS device and download the beta.

  1. Login to your Apple Developer Center account.Apple Developer Center
  2. There are two ways to download and install iOS 12. One way is to download the relevant IPSW file for your device and restore it using iTunes. This takes longer and requires a computer to update. The easier and quicker method is to download the configuration profile directly to your iOS device.iOS 12 configuration file
  3. Head over to Downloads in Safari on your iPhone or iPad, login and look for iOS 12 beta. Tap Download next to iOS 12 beta as per the screenshot below. This will open a dialogue box, tap Allow.iOS 12 beta configuration profile
  4. If you have an Apple Watch paired with your iPhone, iOS will ask where you want to install the profile. Select iPhone here and you will be taken to the Install Profile screen. Tap Install on the top right and enter your passcode. You might need to restart your iOS device to complete the profile installation process.
    iOS 12 beta configuration profile installation
  5. Open Settings > General > Software Update on your iOS device and wait for iOS 12 developer beta to show up. Make sure that your device has at least 50% battery or is plugged in using a charger. Tap on Download and Install and wait for the process to complete. Your device might restart a few times during the install process.
    Install iOS 12

Enjoy testing iOS 12 developer beta 3. The main purpose of Apple’s test builds is to gather feedback and fix issues along the way. Make sure to give feedback to Apple on any bugs and issues you might find, as well as any feature suggestions, using the Feedback app.

Note: you can always download the beta profile from other sources, which lets you skip signing up to Apple’s Developer website. However, it can be a security risk and is not recommended.

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