> For the complete documentation index, see [llms.txt](https://docs.efento.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.efento.io/efento-cloud/adding-devices/nb-iot-loggers.md).

# NB-IoT loggers

You must have **Administrator** or **Manager** permissions to perform this action.

## Before you start

Before adding sensors, ensure that:

* you have a valid **licence** to add loggers,
* you have a valid licence that allows you to activate NB-IoT SIM card.
* you have a mobile device (iPhone / Android phone)

Both licences can be obtained by entering an **activation code**. If you did not add the activation code during onboarding, you can do it at any time in the **Licence Manager** section.

## Adding NB-IoT loggers

To add NB-IoT logger to your Efento Cloud organisation:

1. mobile application for [Android](https://play.google.com/store/apps/details?id=pl.efento.cloud\&hl=en) or for [iOS](https://apps.apple.com/pl/app/efento/id6479740909), open it and login to your Efento Cloud account. If you don't have an account yet, please [create one](/efento-cloud/getting-started/quickstart.md) before proceeding.
2. Log into your Efento Cloud account and:
   1. Android devices: navigate to the main menu (three lines in the upper left corner) -> select **Organisation settings** -> **Add sensors** -> choose  **NB-IoT**
   2. iPhones: Press the "**+**" button in te upper right corner -> **Add deivces**
3. Follow the on-screen instructions to complete the configuration process.

## Troubleshooting

If you are not able to add a sensor use the following guidance to resolve common problems:

* Ensure the sensor is **powered on**.
* Confirm the sensor is within the **coverage area of the NB-IoT network**.
* Verify that the **SIM card is properly installed and activated** in the device.
* Check the **PLMN and APN settings**. If you are unsure how to configure them, start by setting both to **“Auto”**. If the issue persists, contact your **connectivity provider** for the correct settings.
* Make sure the sensor has not already been **added to another Organisation**, as this may prevent it from appearing in your list.

If problems persist after these steps, consult the support team at [help.efento.io](https://help.efento.io) for further assistance.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.efento.io/efento-cloud/adding-devices/nb-iot-loggers.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.