# Why Your Device May Use Default Carrier APNs?

A common connectivity issue in IoT deployments is devices defaulting to carrier-provided APNs (e.g., fl1, 4g.tele2.se, mobile.o2.co.uk, mobilkom.li) instead of using the Monogoto APN (data.mono).

#### Why Does This Happen?

Most cellular modules ship from the factory with preconfigured APN profiles. If your device does not explicitly set an APN in its software (via AT command or modem manager), it may automatically select a default APN based on the Mobile Country Code (MCC) and Mobile Network Code (MNC) of the SIM’s IMSI (International Mobile Subscriber Identity).

This behavior is standard and typically driven by the module’s built-in logic or auto-configuration.

#### How Monogoto Handles Default APNs

The Monogoto network is designed to accommodate this behavior. If your Thing Group is properly configured, data sessions initiated using these default carrier APNs will still be allowed.

#### How to Configure This in the Monogoto Advanced Console

1. Go to Advanced Console > Thing Groups
2. Select or create a Thing Group.
3. Click on "Add Network".
4. In the dropdown menu, select all available APNs.

{% hint style="info" %}
SIMs shipped by Monogoto typically come with Thing Groups preconfigured with these APNs
{% endhint %}

<figure><img src="/files/SWnt23W1GK9IJyV2tntT" alt=""><figcaption></figcaption></figure>

6. Set data.mono as the Default APN
7. Once the APNs are added, ensure that data.mono is selected in the "Default APN" column.

<figure><img src="/files/igw6JpnBhBpHUZ3Zp5us" alt=""><figcaption></figcaption></figure>

6. Verify APNs in the Monogoto Hub - If configured correctly, you will see all these APNs listed for your device on the Things page in the Monogoto Hub.

<figure><img src="/files/gl6MdIULNk22UZYofZ9e" alt=""><figcaption></figcaption></figure>

#### Best Practice: Explicitly Configure data.mono on the device

While Monogoto allows fallback to partner APNs for flexibility, we strongly recommend that your device explicitly sets data.mono as the APN. This ensures:

* Better session stability
* Simplified troubleshooting
* Full Monogoto feature support

Refer to our guide, [How to Diagnose an APN Issue via the Monogoto Hub](/faq/how-to-diagnose-an-apn-issue-via-the-monogoto-hub.md) This document will help you verify APN settings and resolve any misconfigurations.

If you have questions or need further assistance, don’t hesitate to reach out to the Monogoto Support Team. We’re here to help you troubleshoot, optimize your setup, and ensure your IoT deployment runs smoothly. We're happy to assist!<br>


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