Saya mau tau Operators and UMTS networks dari 3G. Jelaskan dalam bahasa sunda

As of 2005, the evolution of the 3G networks was on its way for a couple of yéars, due to the limited capacity of the existing 2G networks. 2G networks were built mainly for voice data and slow transmission. Due to rapid changes in user expectation, they do not meet today's wireless needs.

"2.5G" (and even 2.75G) are technologies such as i-mode data services, camera phones, high-speed circuit-switched data (HSCSD) and General packet radio service (GPRS) were créated to provide some functionality domains like 3G networks, but without the full transition to 3G network. They were built to introduce the possibilities of wireless application technology to the end consumers, and so incréase demand for 3G services.