Models

iOS runs on various different models of devices. This page is used to give an overview of the different model numbers (or "M" numbers) used by devices. The model number of your device is located in the Settings app on the "General -&gt; About" screen under "Model".

Format
The model number of a device begins with a variable first letter representing the source of the device (replacement, engraved, etc.; see below). This is followed by four characters between either "A" and "Z" or "0" and "9" (most commonly only digits). Afterwards is either one or two characters representing the "region" of the device's origin. Depending on the software displaying the string, there may be a slash (" ") followed by a character.

First Letter
The first letter in the model number represents the source of the device. Currently, there are four known possible choices:
 * " ": refurbished unit
 * " ": retail unit
 * " ": replacement unit
 * " ": personalized (engraved) unit

Device1,xxxx Identifiers
Starting in 2021, Apple Bluetooth devices ceased to have descriptive identifier strings such as, and instead switched to identifiers following the format. The four or five digit number is the Bluetooth product identifier in decimal. This may have been implemented to prevent the product name from leaking before release.

This can be found on a Mac through the Bluetooth section of System Report. For example, the product identifier of AirPods Pro 2 is. Converted from hex to decimal, this is. Hence, the device identifier is.

Finding Your Device
To make searching this page easier, the first letter is always " " and the "region" portion and everything after is removed (leaving us with the first five characters of the string). For example, let's say our model number is " ". The first letter is already " ", so we leave it alone. Next, we remove the "region" portion and everything after (the " " at the end) leaving us with " ". A "find-in-page" reveals this is a black 16 GiB iPhone 4S.

If your device is not listed here, please add it yourself or contact an active user.