> 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-groups/how-to-configure-things-group-to-work-only-with-imei-range-tac.md).

# Lock Things Group to IMEI range (TAC)

## Lock Things Group to IMEI range

<mark style="color:orange;">`PUT`</mark> `https://console.monogoto.io/thingsgroup/{THING_GROUP_ID}`

#### Path Parameters

| Name                                               | Type   | Description                         |
| -------------------------------------------------- | ------ | ----------------------------------- |
| THING\_GROUP\_ID<mark style="color:red;">\*</mark> | String | The identifier of your Things Group |

#### Headers

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

#### Request Body

| Name                | Type   | Description                                             |
| ------------------- | ------ | ------------------------------------------------------- |
| TELEPHONY\_PROFILE  | String | Things Group Telephony Profile ID                       |
| THINGS\_GROUP\_NAME | String |                                                         |
| MASTER\_IMEI\_STATE | String | Replace with **true** or **false**                      |
| IMEI\_PREFIX        | String | Replace with the device IMEI range, also known as a TAC |

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

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

{% endtab %}
{% endtabs %}

### Example using **cURL:**

```bash
curl -X PUT \
    --url "https://console.monogoto.io/thingsgroup/{THING_GROUP_ID}" \
    -H "accept: application/json" \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer {TOKEN_HERE}" \
    -d "{ \"TelephonyProfileId\": \"{TELEPHONY_PROFILE}\", \"ThingsGroupName\": \"{THINGS_GROUP_NAME}\", \"IMEIPrefix\": \"{IMEI_PREFIX}\", \"LockMasterImei\": {MASTER_IMEI_STATE}}"    
```

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

* **{THINGS\_GROUP\_ID}** - replace with Things Group ID
* **{TOKEN\_HERE}** - replace with your token
* **{TELEPHONY\_PROFILE\_ID}** - replace with your Things Group used Telephony Profile ID, this can be retrieved through [Get Things Group Information](/developer/api/things-groups/thing-group-information.md).
* **{THINGS\_GROUP\_NAME}** - replace with your Things Group used Telephony Profile ID from the first step.
* **{IMEI\_PREFIX}** - replace with the device IMEI range, also known as a TAC. In order to restrict Things inside this Thing Group to work only with devices from this IMEI range. Please note that you can send empty value in order to remove IMEI range value.
* **{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 range to get SIM card services.&#x20;
  * **false** - Disable Master IMEI limitation to allow all devices to work with this Thing.
    {% endhint %}

Example of request:

```bash
curl -X PUT \
    --url "https://console.monogoto.io/thingsgroup/ThingsGroupId_eej3421b0-bee1-4997-93aa-ce443ca43h347a" \
    -H "accept: application/json" \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer eyJhb6IkpXVCJ9.eyJSb2xlIjoiVXN4lclByb2ZpbGVJZF9kZGM2MThhNC0wNTI1LTQ2MmUtYWN3NzhhMGQxYmbSI6Im4zgFkbWluIiwiQ3VzdG9tsbCwiVXNlcklkIjoiVklkXzg5Yj5Y2OGEyUtNDQThhLTEzZjA0MzJhZDE3YyINTAzgZmUtZGI51My00ZjRiLTktN2U5Yjc0ZWU1ZThlIiwiaWNzM3MjI5L2MDY3NTE2Mjl9.99aSLzP7kTgK6TZGW-xalrMu0GkW6viunt3XxbNng" \
    -d "{ \"TelephonyProfileId\": \"TelephonyProfile_ad766b40-9577-4d91-4679-01664c6834d9\", \"ThingsGroupName\": \"Project A phones\", \"IMEIPrefix\": \"35305311\", \"LockMasterImei\": true}"
```

Expected response (should show Thing Group ID):

```
ThingsGroupId_eej3421b0-bee1-4997-93aa-ce443ca43h347a
```

{% openapi src="/files/lqgrtNg1pOcbxIdacwgh" path="/thingsgroup/{ThingsGroupId}" 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 %}