Codec:G.711 u-Law,G.711 a-Law,G.729A,G.729A/B Voice Quality,VAD,CNG,AEC,LEC,Packet loss
Frequency: Quad Band:850/900/1800/1900MHZ 3G/UMTS Version for all world and Japen (SoftBank Mobile/Docomo) 3G:EDGE/GPRS 850, 900, 1800, 1900 MHz / HSDPA/UMTS 850, 1900, 2100 MHz CDMA 2000(800/1900MHZ)
**Please note** 1. Most CDMA -2000 operators don't offer Answer signal. So VoIP to Mobile, MV-378 will connect soon. CDMA -2000 operators will start billing soon. It doesn't wait mobile side answer 2. CDMA Version doesn't support SMS Feature and 180/183 unavailable 3. CDMA version doesn't have Remote SIM feature