> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://faq.mtxc.eu/sitemap.xml
> Use this file to discover available pages before exploring further.
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# Why can’t I connect to the Internet, although the device is connected to the cellular network?

If your device displays a connection error message (e.g. "Could not activate cellular data network" etc.), you should make sure that you've configured your mobile device right.
If you have an iPhone, please check [this article](/en-us/article/how-to-install-and-configure-the-mtx-esim-on-iphone-1sexrkz/).
If you have an Android device, please check [this article](/en-us/article/how-to-install-and-configure-the-mtx-esim-on-android-bbz2di/).

* Make sure that you are in the country, [covered by the MTX Connect network](http://www.mtxc.eu/en/coverage.html);
* Enable Roaming and **Data Roaming**;
* Switch mobile operator to "auto";
* Set APN to **internet** (all lowercase, without spaces). On IOS, please fill other 3 APNs (LTE, MMS & modem), placed below the first one;
* Restart your mobile (switching the airplane mode ON and OFF is not enough);
* On your personal account page https://selfcare.mtxc.eu/ verify if you have the right data plan activated;
* According to new EU legislation, all mobile customers have to uniquely identify themselves. Please upload a scan or a photo of your ID to https://selfcare.mtxc.eu/dashboard/profile/common or use our mobile app to upload your ID.

Also, please check [this PDF guide](http://www.mtxc.eu/images/SERVICE_GUIDE_Eng.pdf) for your connection troubleshooting.