Here are the netwrok specs :
Beard in Mind the slot 2 sim card only take 4G (data) not 2G (calls)
4G:FDD-LTE(bands 3 / 7)
4G:TD-LTE bands 38 / 39 / 40 / 41
3G: TD-SCDMA (bands 34 / 39)
3G:UMTS / HSPA+ / DC-HSDPA(bands 1 / 2 / 5)
2G: GSM / EDGE bands 2 / 3 / 5 / 8