# How to Configure Thing Usage Limitation by IMEI?

The following chapter contains examples on IMEI Master functionality.\
IMEI Master functionality is very useful for customers who want to restrict the SIM cards to be used only with one device IMEI number or with one manufacturer device IMEI range (TAC). This functionality adds an extra layer of security, since in case your SIM card will be lost or stolen they will not be usable in other devices.

{% content-ref url="/pages/-Mf2VqGMwbdruk6pDFJp" %}
[How to Configure Thing to Work Only With One Device IMEI?](/advanced-console/platform/how-to-configure-device-limitation-by-imei/how-to-configure-thing-to-work-only-with-one-device-imei.md)
{% endcontent-ref %}

{% content-ref url="/pages/-Mf2VpHYlD1JueqDnAn7" %}
[How to Configure Things Group to Work Only With IMEI range (TAC)?](/advanced-console/platform/how-to-configure-device-limitation-by-imei/how-to-configure-things-group-to-work-only-with-imei-range-tac.md)
{% endcontent-ref %}

{% hint style="info" %}
[For more information about IMEI you can read this article <br>](https://en.wikipedia.org/wiki/International_Mobile_Equipment_Identity)[For more information about TAC you can read this article](https://en.wikipedia.org/wiki/Type_Allocation_Code)
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.monogoto.io/advanced-console/platform/how-to-configure-device-limitation-by-imei.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.