1. Oct 24, 2019 you can find the UDID when you connect your iPhone to your macOS Catalina mac: = Finder = Select you iPhone in the sidebar = Tab 'General' = Click on the text that is shown below your device name. Then the text changes ans will show additional infos like UDID, serial number.
2. Click on the 'Serial Number' text to reveal the device's UDID. Therefore you'll have to reference it when registering your device on Apple's developer portal, which we'll cover next. Click the serial number, and it will change to the UDID. App displayed in the devices section of the Provisioning Portal.
3. Dec 05, 2019 The first backup of the device will have just the UDID as the folder name, while subsequent backups will have the UDID followed by a date. If you have backed up multiple devices, click the 'List View' button and use the 'Date Modified' column to help determine which device the folder belongs to.

Apple serial numbers. The API supports all three of Apple's major serial number formats: legacy, 2000 and 2010. Examples: F4412SAM0001 is a legacy format serial (for the early 128k Mac) 84021NCV3NP is a 2000 format serial; C8QH6T96DPNG is a 2010 format serial; Apple will likely be able maintain the 2010 format serials until the early 2020s. Oct 25, 2017 Connect your iPhone to your Mac. Open iTunes from the Dock or Applications folder on your Mac. Click the phone icon, and you'll see your device's serial number displayed right below your phone number. Click on Serial Number so that it changes to display your UDID.

Understanding common Apple codes and identifiers

Apple use many different identifiers with their products. The table below illustrates the differences between some of the most important codes:

The API supports many other Apple identifiers, most of which are described below.

Note that we can expose Apple GSX service data for some clients.

Conflicts in Apple's identifier terminology

A number of the identifier names that Apple uses are re-used by them in different contexts. For instance, whilst an Apple product's box may say its model is MC922LL/A, Apple's 'Identify your iPhone model' page only references identifiers with the format A1865. These are completely different IDs. Similarly, if one is using iTunes to learn about a device, it could state the 'model identifier' as iPhone10,6, which is yet a third type of identifier.

As if that weren't confusing enough, Apple's internal names are referred to as 'board ID's in some areas by Apple and the Open Source community. However, this is not the same as the BOaRD ID or the logic board ID that Macs use (eg. Mac-F4208DC8), and as such the API adheres to 'internal name' rather than the thrice-defined 'board ID'.

Having spoken with a large number of Apple Geniuses -- and many Apple engineers & managers over a series of WWDCs -- it's clear that there's ambiguity within Apple on what is meant by 'an Apple model code'. For our purposes, this usually means a true model / MPN if the context buying through resellers or servicing, or a Family number when ordering new direct from Apple.

The examples in this document are shown using the DeviceIdentifier Python client library.

Apple serial numbers

The API supports all three of Apple's major serial number formats: legacy, 2000 and 2010. Examples:

• F4412SAM0001 is a legacy format serial (for the early 128k Mac)
• 84021NCV3NP is a 2000 format serial
• C8QH6T96DPNG is a 2010 format serial

Apple will likely be able maintain the 2010 format serials until the early 2020s, when they will run out.

Apple MLB serial numbers

The API supports Apple's main logic board (MLB) serial formats, for both 13 and 17 digit codes.

Apple model numbers (MPN)

Also known as: Marketing Part Number (MPN)

An Apple model number identifies a particular hardware configuration of an Apple product. Apple model numbers can be presented with or without their regional or sale type encoding. These are also known as a marketing part number, or MPN. MPN is a misnomer in the sense that model numbers aren't actually numbers.

Model numbers are always prefixed with a sale code (often but not necessarily M), and usually follow with a letter and some numbers. They end with an optional sale region indicator of variable length.

What's encoded in an Apple model number?

Apple Model codes can provide the sale region of a device, as well as whether it was sold at retail, refurbished, or personalised, and the following data:

• Apple Internal name class. This can be used to narrow it to a range of internal names.
• Apple Identifier.
• Sale region. The broad region that the device was intended to be sold in. This is stored as an optional part of the number.
• Model specification. MPNs are reliable for indicating case size, colour, material and storage for iPhones, iPads, Apple Watches and computers.
• OEM carrier. MPNs are typically made available to a discrete range of carriers, and carrier range can be identified by examining them.
• Sale type. ie. whether the unit was sold as retail, refurbished, replaced, or personalised.

Example Model numbers

Working with Apple Model numbers

• Example Apple Model direct API request: MC605FD/A
• Example Apple Model client library request:

Apple identifiers

Apple identifiers are their core, top-level model identifier, such as iPhone9,3.

Apple internal names

Internal names are Apple's internal model numbers, like N90AP. They are sometimes referred to as BoardConfig, and also -- misleadingly -- as HardwareModel.

Apple IDFA / IDFV

identifierForAdvertiser (IDFA) and identifierForVendor (IDFV) values replaced the UDID after iOS 5. They are set per application, or per vendor.

Serial Number Check

Apple state this of the IDFA:

iOS 6 introduces the Advertising Identifier, a non-permanent, non-personal device identifier, that advertising networks will use to give you more control over advertisers’ ability to use tracking methods. If you choose to limit ad tracking, advertising networks using the Advertising Identifier may no longer gather information to serve you targeted ads. In the future all advertising networks will be required to use the Advertising Identifier. However, until advertising networks transition to using the Advertising Identifier you may still receive targeted ads from other networks.

And this for the IDFV:

Serial Number Lookup

An alphanumeric string that uniquely identifies a device to the app’s vendor. (read-only)

The value of this property is the same for apps that come from the same vendor running on the same device. A different value is returned for apps on the same device that come from different vendors, and for apps on different devices regardless of vendor.

Ole Begemann has written more on the migration from UDID.

Apple Unique Device Identifiers (UDIDs)

There are two formats of UDID:

• 2007: This format was introduced with the first iPhone and used on devices introduced up until 2018. It is a non-reversible composite identifier built from IMEI, ECID and MAC values. It is represented as a 40 character lowercase hex value.

• 2018: This newer format was introduced for device models manufactured in 2018 and onwards (ie. iPhone XS, XS Max, XR, and Apple Watch Series 4). It is an uppercase 8 character hex value joined to a 16 character uppercase hex value by a dash (-) in the format 00000000-0000000000000000.

Apple usually uses this ID to associate a device with an iCloud ID. This also holds the Find My iPhone activation status. The UDID was deprecated for use within iOS applications with the introduction of iOS 5, though it still has a number of other uses

Apple Family numbers / 'A' numbers

Find My Udid

Apple describe these for each phone on their 'Identify your iPhone model' page.