The cellular technology used depends on the version of the Cloud Connector.
The Cloud Connector (2nd Gen) has built-in cellular support for 4G.
The Cloud Connector EU 4G has built-in cellular support for 4G, 3G, and 2G.
The Cloud Connector US 4G has built-in cellular support for 4G.
The Cloud Connector EU 3G/2G has built-in cellular support for 3G and 2G.
The phase-out of 2G and 3G is already in progress in numerous countries. For more information on timelines, please visit the following article. As a result, EU 2G/3G devices are anticipated to lose compatibility with cellular networks soon.