Please refer to the section below for more details. The UCM supports our wide range of mobile broadband devices, including the new Telstra USB 4G and prepaid services. Access to online directories such as Yellow Pages and White Pages.International roaming pop up messages – when roaming overseas you will receive messages advising you of the volume of data you have used while overseas.It will provide you with a range of additional features including: Telstra Universal Connection Manager The Universal Connection Manager (UCM) is the administrative application for your mobile broadband service.