International Mobile Equipment Identity (IMEI)

An International Mobile Equipment Identity (IMEI) number is a unique 15-digit identifier assigned to mobile devices and used to distinguish between devices on mobile networks. On most phones, users can display IMEI numbers on the screen by dialing *#06#. All working mobile phones that are connected to a mobile network have IMEI numbers, which play a critical role in identifying valid devices, enabling security features, and preventing unauthorized use. These numbers also help manufacturers and network operators identify the device model and origin. Knowing a phone’s IMEI is especially valuable when a device is lost or stolen, as mobile operators can block the IMEI to prevent the device from connecting to cellular networks, thereby helping protect against data breaches.

In mobile device troubleshooting, the IMEI provides a foundation for technical support teams to verify device legitimacy, track hardware issues, or investigate connectivity problems. Android devices often support secret unlock codes and other phone unlock code types that reveal engineering menus or unlock carrier restrictions. These codes can be useful to professionals performing in-depth diagnostics, but individual users should know that using them may be restricted or void the warranty on their phones. iPhones offer field mode for iPhone, accessible via special codes like 3001#12345#, which allows users to check signal strength, local networks, and network parameters. However, availability of field mode may vary depending upon the iOS version. On both platforms, accessing these advanced settings can offer insight into call forwarding status, the ability to enable or disable call waiting, and options to hide or show Caller ID visibility.

Having access to phone information and usage statistics also helps IT professionals understand and manage device health. On Android phones, dialing certain codes lets you access phone statistics such as device uptime and signal history. These codes also reveal battery information and background process metrics that indicate how effectively background tasks are running and how they are impacting system performance. Such insights are often used in enterprise environments where consistent device performance is essential. Factory reset options, whether via settings or special boot modes, reset a device to its original state. Reset devices retain their same IMEI numbers, which are needed to reauthenticate with mobile networks, ensuring only legitimate devices rejoin the system.

In shared mobile device settings, the IMEI is a cornerstone of secure mobile management. Imprivata Mobile Access Management leverages device identifiers like IMEI to control access to sensitive data, enforce usage policies, and ensure that only authorized users interact with certain applications. When a device is passed between users, the IMEI ensures continuity of device identity, while the user sessions remain isolated. This distinction supports compliance, enhances auditability, and ensures accurate device tracking even in dynamic use scenarios.