OS	Android OS, v6.0 (Marshmallow)
Network bands	GSM / HSPA / LTE
Speed	HSPA 42.2/5.76 Mbps, LTE Cat9 450/50 Mbps
Network frequencies	GSM 850 / 900 / 1800 / 1900 HSDPA 850 / 900 / 1900 / 2100 LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - G930F, G930FD HSDPA 850 / 900 / 1700 / 1900 / 2100 LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 29(700), 30(2300), 38(2600), 39(1900), 40(2300), 41(2500) - G930W8
SIM	Nano-SIM
WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
CPU	Octa-core (4x2.3 GHz Mongoose & 4x1.6 GHz Cortex-A53)
RAM	4 GB
Internal memory	128 GB

Samsung Galaxy S7 APN settings & network compatibility in Sri Lanka

Samsung Galaxy S7 network specifications