> For the complete documentation index, see [llms.txt](https://docs.monogoto.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.monogoto.io/developer/api/things/how-to-enable-disable-master-imei-settings-for-a-thing.md).

# Lock Thing to IMEI

This guide will show you how you can Enable and Disable Master IMEI settings for your SIM card, in order to limit the SIM card usage by device IMEI.

## Configure a Thing to only work with a specific IMEI

<mark style="color:orange;">`PUT`</mark> `https://console.monogoto.io/thing/update`

#### Headers

| Name                                          | Type   | Description               |
| --------------------------------------------- | ------ | ------------------------- |
| YOUR\_TOKEN<mark style="color:red;">\*</mark> | String | Your authentication token |

#### Request Body

| Name                                    | Type   | Description                            |
| --------------------------------------- | ------ | -------------------------------------- |
| CAS<mark style="color:red;">\*</mark>   | String | Retrieve via **GET Thing Information** |
| ICCID<mark style="color:red;">\*</mark> | String | The ICCID of your SIM                  |
| MASTER\_IMEI\_STATE                     | String | Replace with **true** or **false**     |
| DEVICE\_IMEI                            | String | IMEI of your device                    |

{% tabs %}
{% tab title="200: OK OK" %}

```javascript
{
    Thing undefined successfully saved.
}
```

{% endtab %}

{% tab title="400: Bad Request Invalid Input Data" %}

```javascript
{
    // Response
}
```

{% endtab %}

{% tab title="401: Unauthorized Unauthorized" %}

```javascript
{
    // Response
}
```

{% endtab %}

{% tab title="500: Internal Server Error Internal Server Error" %}

```javascript
{
    // Response
}
```

{% endtab %}
{% endtabs %}

{% hint style="info" %}
This API call requires the "**cas**" value that confirms the Thing settings to be up to date. The "**cas**" value can be retrieved through [**Get Thing Information**](/developer/api/things/how-to-obtain-thing-ip-address.md).
{% endhint %}

### Example using **cURL**:

```bash
curl -X PUT \
    --url "https://console.monogoto.io/thing/update/" \
    -H "accept: application/json" \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer {TOKEN_HERE}" \
    -d "{\"cas\": \"{CAS}\",\"ThingId\": \"/thing/ThingId_ICCID_{ICCID}\",\"LockMasterImei\": {MASTER_IMEI_STATE},\"MasterIMEI\": \"{DEVICE_IMEI}\"}"   
```

{% hint style="info" %}
Please note that the above shown command needs to be replaced with information:

* **{TOKEN\_HERE}** - replace with your token, see [Authentication](/developer/api/how-to-obtain-login-token.md)
* **{CAS}** - replace with your Thing "**cas**" value, retrieved via [Get Thing Information](/developer/api/things/how-to-obtain-thing-ip-address.md)
* **{THING\_ICCID}** - replace with *ThingId\_ICCID\_ABC*, where *ABC* is your thing *ICCID*.
* **{MASTER\_IMEI\_STATE}** - replace with **true** or **false** value, depending on what you want to do:
  * **true** - Enable Master IMEI limitation to allow only our entered device IMEI to get SIM card services
  * **false** - Disable Master IMEI limitation to allow all devices to work with this Thing
* **{DEVICE\_IMEI}** - replace with the device IMEI you want to work with this Thing. *Note that you can send empty value in order to remove Master IMEI value*
  {% endhint %}

Request example:

```bash
curl -X PUT \
    --url "https://console.monogoto.io/thing/update/" \
    -H "accept: application/json" \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer eyJhb6IkpXVCJ9.eyJSb2xlIjoiVXN4lclByb2ZpbGVJZF9kZGM2MThhNC0wNTI1LTQ2MmUtYWN3NzhhMGQxYmbSI6Im4zgFkbWluIiwiQ3VzdG9tsbCwiVXNlcklkIjoiVklkXzg5Yj5Y2OGEyUtNDQThhLTEzZjA0MzJhZDE3YyINTAzgZmUtZGI51My00ZjRiLTktN2U5Yjc0ZWU1ZThlIiwiaWNzM3MjI5L2MDY3NTE2Mjl9.99aSLzP7kTgK6TZGW-xalrMu0GkW6viunt3XxbNng" \
    -d "{\"cas\": \"1236781245913489491\",\"ThingId\": \" ThingId_ICCID_8912372646888991\",\"LockMasterImei\": true,\"MasterIMEI\": \"86696204060123456\"}"
```

Expected response:

```json
Thing undefined successfully saved.
```

{% openapi src="/files/lqgrtNg1pOcbxIdacwgh" path="/thing/update/" method="put" %}
[JPU\_CustomerAPIV\_Without\_Test it.yaml](https://3922449203-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M0mPxGpottOEfcucXOR%2Fuploads%2FXtNpEMk17YOUrC39Cmvr%2FJPU_CustomerAPIV_Without_Test%20it.yaml?alt=media\&token=09b74b38-dd09-4edc-8f98-4df792b3c986)
{% endopenapi %}