Mobile Network Support and BandLG Optimus LTE SU640 have Card Slots,LG Optimus LTE SU640 support dual mode based on GSM/CDMA based network providers. LG Optimus LTE SU640 mobile device support GSM 2G Band Frequency at , LG Optimus LTE SU640 mobile device support CDMA 2G Band Frequency at CDMA 800,CDMA 1900and Hight Speed 3G Network Band at HSDPA 2100,LG Optimus LTE SU640 also support LTE based 4G Networks Support at Frequency level LTE 800,comes with network handling