32 GSM Channels with 128 SIM Slots, Easy to Conduct SIM Rotation Locally
16 GSM Channels with 64 SIM Slots, Easy to Conduct SIM Rotation Locally
32 GSM/CDMA/WCDMA Channels SMS Sending a Receiving
GSM: Quad-band 850/900/1800/1900MHz
8 GSM/CDMA/WCDMA Channels
4 GSM/CDMA/WCDMA Channels
1 GSM ports, GSM: quad-band 850/900/1800/1900MHz