# Connecting power and inserting SIM card

Before powering on the Efento LTE Gateway, please ensure that all [safety and installation guidelines](/efento-gateways/important-information/safety-guidelines.md) have been followed. Proper preparation helps prevent hardware damage and ensures stable operation from the moment the device starts up.

{% stepper %}
{% step %}

### **Connect the antennas**

Always connect the antennas **before** powering on the gateway. Operating the device without the antennas attached may cause damage to the internal radio modules or reduce communication performance.

<figure><img src="/files/gGmgLe3ECj5uBf1p3ImO" alt="" width="375"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Insert the SIM card

Insert a 4FF (nano-SIM) card into the LTE Gateway by sliding the card into the SIM slot with the metal contacts facing down and the cut corner oriented according to the slot’s outline. Gently push the SIM card in until it clicks into place, ensuring it sits flush with the device.

<figure><img src="/files/60Qe1ePKfkdcubFungl6" alt="" width="375"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### **Connect the power supply**

A USB power supply is included with the gateway. Connect the power adapter to the **USB-C port** on the back panel of the device.

<figure><img src="/files/R8c5hq1vrdId2WkYrDTO" alt="" width="375"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### Powering on the gateway

&#x20;To turn on the Efento LTE Gateway, press the PWR button located on the back panel of the device.

<figure><img src="/files/IYWKHR5AorwxOmw0TZ0m" alt="" width="375"><figcaption></figcaption></figure>
{% endstep %}

{% step %}

### **Confirm startup and configuration mode**

When powering on a gateway that has not been configured before, it automatically enters **configuration mode**. In this mode, the device can be configured using the **Efento mobile app**.

* Configuration mode is indicated by a **blinking orange LED**.
* This mode remains active for **2 minutes**.

To re-enter configuration mode at any time, press the button located on the **back panel** of the gateway **twice**.
{% endstep %}

{% step %}

### You can now configure your gateway

Configure the Efento LTE Gateway to send the data to:

* [Efento Cloud](/efento-gateways/lte-gateway/configuration-with-efento-cloud.md)
* [a custom server](/efento-gateways/lte-gateway/configuration-with-a-custom-server.md)
  {% endstep %}
  {% endstepper %}


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