- UMTS (Universal Mobile Telecommunications System) is the primary 3G standard based on W- CDMA technology, offering significantly higher data speeds than 2G. - WiMAX (Worldwide Interoperability for Microwave Access), based on the IEEE 802.16 standard, is often categorized as a 4G technology or a pre-4G technology, but early discussions and deployments sometimes overlapped or competed with 3G networks as alternative mobile broadband solutions.