Advanced explanation:
UMTS (Universal Mobile Telecommunications System) is the core technology for 3G networks and introduced WCDMA (Wideband Code Division Multiple Access) as a new access method. It offered data transfer rates of up to 2 Mbps (in early versions) and thus supported broadband applications on mobile devices for the first time. UMTS introduced mobile video calls and multimedia services such as mobile TV. It enabled greater network capacity and was designed for simultaneous voice and data transmission. Later improvements such as HSPA and HSPA+ increased data rates to up to 42 Mbps.