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June 2, 2024

How to Change Device ID

Device ids are unique identifiers assigned to a mobile phone or tablet at the time of manufacture. Identifiers are used to track and report on user behavior. They help app and platform developers connect in-app events with the corresponding ads or actions taken by a consumer. This allows marketers to measure the effectiveness of their campaigns and gain a greater understanding of how consumers move through and interact with their apps.

Historically, devices were identified by their hardware-based identifiers. Apple devices, for example, have an identifier called the UDID that is read by Apple systems during the initial setup process to activate and debug the device. The UDID is also associated with an Apple ID and enables the App Store, iTunes, and Apple Music to recognize the devices and download content automatically. Apple’s current iOS 14.5 and the App Tracking Transparency feature provide users with the option to opt out of this sharing by resetting their UDID or by selecting a setting that limits ad tracking on a device-by-device basis. Similarly, Google’s Android device ID (AAID) is reset to zero when the user opts out of ad personalization in their settings.

A mobile device’s identifier is read by app and device tracking tools at the moment the phone boots up, which means it is permanently associated with that particular phone. In this way, even if a user resets their identifier or changes their phone number it can still be used to track them in the same app or across apps they use. This is known as deterministic attribution, which allows marketers to make informed decisions about their ad budgets.

The most common device ids are the ones associated with a mobile operating system. Typically, they are unique alphanumeric codes that identify a device at the time of its first boot. These identifiers are read by app developers and various services and can be changed, but that should only be done with a developer account in order to prevent security issues.

Device ids are used by app developers to monitor how their app is being used by consumers. They are often used to record attribution events such as app installs and sales. These events are tracked and recorded by a mechanism known as an attribution SDK (software development kit). This mechanism looks for click or view data within the device ids of consumers who have clicked on or watched an ad. The ad platform then credits the app with the appropriate event.

The app developer can then match the ad campaign to the in-app event that resulted. This allows them to understand how effective the ad was and what parts of their app might need improving or expanding. This is a key piece of their business intelligence. In the future, they can build new features that better meet consumers needs and increase conversion rates. Ultimately, they can transform app users into devoted customers by gaining a deeper understanding of how and why they use their app.