GSM / HSPA / LTE
GSM 850 / 900 / 1800 / 1900 - RM-821, RM-820
HSDPA 850 / 900 / 1900 / 2100 - RM-821, RM-820
LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800) - RM-821
LTE band 4(1700/2100), 17(700) - RM-820 (AT&T)
HSPA 42.2/5.76 Mbps, LTE Cat3 100/50 Mbps
GPRS (General Packet Radio Service) is a packet oriented mobile data service on the 2G and 3G cellular communication system's global system for mobile communications (GSM), Generally, GPRS is used for the purpose of wireless data transfer, such as sharing pictures and videos or browsing the Internet via a mobile phone connection.
EDGE (Enhanced Data GSM Environment) is a wireless network technology generally considered the next step in the 2G network offers data transfer rates up to four times faster than ordinary GSM networks, Generally, EDGE is used for the purpose of wireless data transfer, such as sharing pictures and videos or browsing the Internet via a mobile phone connection.