Register quickly on iPhone or iPad:
Find my UDID
1. Download our Verified  profile
2. Open the Settings app

Register quickly on iPhone or iPad

Find your UDID, register your device, and install iOS 18 — all on your iPhone or iPad. This is the easiest way to register your UDID:

Find my UDID

Find my UDID

Please use Safari on iPhone or iPad to automatically find your UDID.

  1. Download our configuration profile with Safari on iOS.
  2. Tap the Allow button to download the profile.
  3. Open the Settings app.
  4. Tap the new option in Settings:
    Profile Downloaded 
  5. Verify that the profile is secure and signed: udid.co Verified 
  6. Install the secure profile to send your UDID to our website. (This profile will then be automatically removed.)
  7. Complete your PayPal purchase.

Our Registration Guarantee:

We are committed to properly registering your device with the Apple Developer Program so that you can install the iOS 18 and iPadOS 18 Developer Beta. You will receive a confirmation email when your device is registers within the guaranteed time:

Frequent Questions

Why do I have to register my UDID with Apple?

You can enroll your device in the Apple Developer Program with its Unique Device Identifier (UDID). If you have registered your device’s UDID with Apple in advance, you can easily install and activate iOS 18.

What is a UDID?

Every iPhone and iPad has a 24 or 40 character Unique Device Identifier (UDID). Your device’s UDID is not its serial number; the UDID and serial number are very different. If you reading this on iOS, download our configuration profile and then go to Settings Profile Downloaded to find your devices’ UDID.

How long will registration take?

The registration process is fast and simple. You will receive a confirmation email when your device is registers within the guaranteed time:

Can I update to the watchOS beta?

Yes, just register your iPhone — there is no need to register your Apple Watch. After registering your iPhone, you will receive a link to the configuration profile for iOS software previews. Open this link on your iPhone and install the profile.

What about tvOS?

Yes, just register your iPhone or iPad — there is no need to register your Apple TV. After registering, you will receive a quick setup guide for tvOS software previews.

What about macOS?

We are not able to support macOS at this time,

Download iOS 18

Supported Devices

Help Documents from Apple

Before Installing

Before you install iOS 18:

  1. Submit your UDID and complete your PayPal purchase.
  2. Ensure your device is registered with Apple. You will receive an email from udid.co confirming that your device is registered.

Do not rely on iCloud backups. Save a local backup!

Always have a backup plan. If you want to downgrade to iOS 18, you will need an iOS 18 backup saved on your computer. You will not be able to restore from an iCloud backup made with iOS 18.

  1. Connect your iOS device to your computer and open the Finder (Mac) or iTunes (PC).
  2. Select the “Back Up Now” button to save a backup of iOS 18 and your files.

Contact Support

Email Support: 8 AM to 11 PM Eastern Daylight Time

Email Support