Each mobile device works on the wireless network and these networks are divided into different category such as 2G, 3G, 4G further they are subdivided into the category like GSM, UMTS, LTE on different bands.
GSM / WCDMA / FDD-LTE
2G Network Bands
2G stands for the second-generation wireless telephone network.It works on Standard like GSM, D-AMPS, PDC.2G Networks supports Digital voice services and slow data transmission (2.5G (GPRS) or 2.75G (EDGE) ) but these networks are faster than analog (1G) systems.
Yes Support 2G: GSM 850MHz, GSM 900MHz, GSM 1800MHz, GSM 1900MHz
3G Network Bands
3G stands for the third generation wireless telephone network in compare of 2G it supports faster data speed, always-on data access, better voice transmission capacity.UMTS,WCDMA, Ev-Do are the main standard of 3G technology.
Yes Support 3G: Band 1 (WCDMA 2100MHz), Band 2 (WCDMA 1900MHz), Band 5 (WCDMA 850MHz), Band 8 (WCDMA 900MHz)
4G Network Bands
4G stands for the fourth generation of wireless telephone network it is more efficient and faster in terms of data rate, voice transmission and it is very different technology in compare of 3G.The most common standard are LTE (Long Term Evolution) and Mobile WiMAX.
Yes Support 4G: FDD-LTE Band 1 (2100MHz), Band 3 (1800MHz), Band 7 (2600MHz), Band 8 (900MHz), Band 28 (700MHz), TD-LTE, Band 38(2570-2620), Band 39(1880-1920), Band 40(2300-2400), Band 41(2555-2575)
SIM Card Type
SIM stands for Subscriber Identity Module which securely stores subscriber's information such as phone numbers and text messages. Users can easily switch SIM card from one mobile set to another. SIM card is responsible for communication among several mobile devices using different kinds of networks such as GSM, UMTS, LTE etc.
Dual SIM Support
Smartphone comes with Single SIM or Dual SIM slot.
Yes With Dual Nano SIM, Dual Standby Support