Every iOS developer and power user has, at some point, needed to locate the unique identifier for an Apple device. This string of characters, known as the UDID, is essential for tasks ranging from enterprise app distribution to troubleshooting device-specific issues. While Apple has significantly restricted access to this information in recent iOS versions, there are still reliable methods to retrieve it. This guide walks through the most effective ways to get the UDID from an iPhone without relying on deprecated techniques.
Understanding What a UDID Is
The term UDID stands for Unique Device Identifier, a 40-character alphanumeric string that is permanently assigned to every iOS device. It serves as a serial number of sorts, but unlike the IMEI or serial number, the UDID is specifically used by developers to register devices for ad-hoc testing. Because it is hard-coded into the device during manufacturing, it cannot be changed, making it a consistent reference point. However, due to privacy concerns regarding tracking, Apple no longer displays this information directly in the Settings app, requiring users to find it through other official channels.
Method 1: Using Apple Configurator 2
For those who manage multiple devices or require the UDID for development purposes, Apple Configurator 2 is the most efficient official tool. This free application, available exclusively on the Mac App Store, allows you to prepare and supervise devices in a supervised state. Once you connect the iPhone to your Mac, the software recognizes the hardware and displays detailed information. You can simply click on the device in the sidebar to view the identifier on the main panel, and you can copy it with ease for registration in developer portals.
Steps to Retrieve via Configurator
Download and install Apple Configurator 2 from the Mac App Store.
Connect your iPhone to the Mac using a certified USB cable.
Open the application and select your device from the list.
Locate the "Identifier" field; the full UDID will be displayed in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
Method 2: Retrieval Through Xcode
Developers who already have Xcode installed on their Mac can find the UDID without adding extra software to their system. Xcode maintains a list of connected devices and provides their identifiers for provisioning profile management. This method is particularly useful if you are already working within the Apple development ecosystem. The process is straightforward and integrates seamlessly with the tools required to build and test applications.
Steps to Retrieve via Xcode
Install the latest version of Xcode from the Mac App Store.
Connect your iPhone to the Mac and open Xcode.
Navigate to the Window menu and select "Devices and Simulators."
Choose your physical device from the left sidebar; the UDID will be listed under the "Identifier" heading.
Method 3: The Apple ID Website
Apple provides a direct web interface for accessing device information associated with your account. This method is ideal for users who do not have access to a Mac development environment but can still access their iCloud account via a browser. By logging in, you can see a list of devices that have used your Apple ID, including crucial details like the model, serial number, and the UDID. It serves as a centralized location for account management without requiring any local software installation.
Steps to Retrieve via iCloud
Visit the Apple ID website and sign in with your credentials.
Scroll down to the "Devices" section and click on the "Manage Devices" link.
Select the iPhone in question from the list of registered hardware.
The device details page will show the "Serial Number" and, in some cases, the "UDID" if the device is enrolled in certain developer programs.
