Locating the iPhone UDID is a fundamental task for developers, enterprise administrators, and users who need to bypass automated device management or enroll in beta programs. This unique alphanumeric string serves as a permanent identifier for the hardware, distinct from the IMEI or serial number, and remains essential for tasks such as enterprise app distribution, device registration with carriers, and troubleshooting specific software issues. Finding this identifier is straightforward once you understand the available methods, which range from using iTunes on a desktop to leveraging the latest iOS features directly on the device.
Understanding What an UDID Is and Why It Matters
The Identifier for Advertisers (IDFA) often causes confusion, but the iPhone UDID (Unique Device Identifier) is a separate, older concept central to device management. This 40-character string is specifically required when installing enterprise-signed applications or registering devices with Mobile Device Management (MDM) solutions without using the App Store. Unlike app-specific identifiers, the UDID is baked into the hardware at the firmware level, ensuring that developers and IT departments can reliably target a specific physical device. Knowing how to find iPhone UDID is the first step in managing these technical workflows securely and efficiently.
Using Finder or iTunes on a Computer
For users who manage multiple devices, the traditional method via a connected computer remains one of the most reliable ways to retrieve this identifier. This process syncs the hardware information with your Apple desktop software, providing a clear view of the details that are not always visible in the settings menu. Follow these steps to locate the code using a Mac or Windows PC.
Steps for macOS Catalina and Later
With the transition to Apple’s modern operating system, Finder has replaced iTunes for device management, offering a more streamlined interface. The data is stored locally on the device and syncs automatically when the phone is unlocked and trusted.
Connect your iPhone to the Mac using a certified USB cable.
Open Finder and locate your device in the sidebar under the "Locations" section.
Click on the device name to open the general information panel.
Scroll down to the "Serial Number" field; clicking it once will toggle the view to display the UDID.
Steps for Windows and Older macOS Versions
Users with PCs or systems running macOS Mojave or earlier will rely on the iTunes application, which serves the same purpose in retrieving the device’s technical data.
Launch iTunes and connect your iPhone via USB.
Click on the small device icon that appears near the top-left corner of the window.
Select the "Summary" tab from the menu that appears.
Find the "Serial Number" entry and click it to reveal the full UDID.
Retrieving the Identifier Directly on iOS
Apple has simplified the process in recent years, allowing users to access this information without the need for a computer. Modern versions of iOS and iPadOS include a dedicated section within the settings menu where the code is displayed in full. This method is ideal for users who are away from their desktop or prefer to handle device management independently.
Viewing the Code in Settings
The Settings app provides a straightforward path to the identifier, requiring only a few taps to expose the technical details. This built-in functionality eliminates the barrier of needing external software.
Open the "Settings" app on your home screen.
Navigate to "General" and scroll to the bottom to tap on "About".
Scroll down until you see the "Identifier for Vendor" or "Serial Number" entry.
