Study these Interview MCQ Questions and Answers on 3G UMTS CDMA2000 (CDMA) network Architecture and Interfaces. UMTS network is called a Third Generation Network (3G). UMTS works on WCDMA, CDMA2000 and TD-SCDMA implementations by 3GPP. A 3G mobile network offers good download and upload speeds. GPRS network in 3G is similar to that of the 2G GSM network. You can know information about frequency bands used in 3G networks. WCDMA based 3G networks are much faster than CDMA2000 based 3G networks. These CDMA2000 or IS-2000 network interfaces are compatible with IS-95 CDMA networks.