In the user interface (EUI), when you are configuring an Endpoint, you have the possibility to activate the IMEI lock. The IMEI is a unique number used to identify devices connected to a GSM network. The IMEI lock option allows EMnify users to lock the use of a SIM specifically to a device, indicated by its IMEI code.
To use the IMEI lock, you do not need to know the IMEI of your device.
Effects of the IMEI block
The EUI reads the IMEISV (software version of the IMEI) after the first PDP-Context has been established. Example: when the device has reached an internet connection. The user has the possibility to block the use of the SIM data only for a specific device. So if the SIM is moved to another device, the following error will be shown in the EUI
“PDP Context Request rejected, because IMEI lock active, but IMEIs do not match, EP IMEI=3562580635695401, IMEI provided from network = 8628170310374321”
Limitations of an IMEI block
Considering that the IMEI of a device is only sent when a PDP-Context has been established, when an IMEI lock is activated, all factors outside the internet data will continue to work on other devices. So for example, from another device it will be possible to attach to an operator and send/receive messages.