3G / 4G service provider use different standards and frequency for their data service. You need to check which router type is working with your provider.  Only the internal modem of the router is different, WLAN, ethernet ports.. are the same.

Product code	main use of router	Frequency
800-099106 Option LTE Router	Europe, Middle East, Africa, Korea, Thailand	4G FDD-LTE: B1 (2100 MHz),B3 (1800MHz), B7 (2600MHz), B8 (900MHz), B20 (800 MHz), B28 (700 MHz) 3G: B1 (2100 MHz), B8 (900 MHz) GSM/EDGE: 900/1800 MHz
800-099107 Option LTE Router NA	North America (AT&T, Bell, T-Mobile)	4G FDD-LTE: B2(1900 MHz), B4 (1700 MHz), B12 (700 MHz9 3G: B2 (1900 MHz), B4 (1700 MHz), B5 (850 MHz)
800-099108 Option LTE Router NV	North America (Verizon)	4G FDD-LTE: B4 (1700 MHz), B13 (700 MHz)
800-099109 Option LTE Router A	Australia (Telstra)	4G FDD-LTE: B1 (2100 MHz), B3 (1800 MHz), B5 (850 MHz), B7 (2600 MHz), B28 (700 MHz) 3G: B1 (2100 MHz), B5 (850 MHz)
800-099110 Option LTE Router S	South America, Australia, New Zealand, Taiwan	4G FDD-LTE: B1(2100 MHz), B2 (1900 MHz), B3 (1800 MHz), B4 (1700 MHz), B5 (850 MHz), B7 (2600 MHz), B8 (900 MHz), B28 (700 MHz) 4G TDD-LTE: B40 (2300 MHz) 3G: B1 (2100 MHz), B2 (1900 MHz), B5 (850 MHz), B8 (900 MHz) GSM/EDGE: 850/900/1800/1900 MHz
800-099111 Option LTE Router J	Japan	4G FDD-LTE: B1 (2100 MHz), B3 (1800 MHz), B8 (900 MHz), B18 (850 MHz), B19 (850 MHz), B26 (850 MHz) 4G TDD-LTE: B41 (2500 MHz) 3G: B1 (2100 MHz), B6 (850 MHz), B8 (900 MHz), B19 (800MHz)
800-099112 Option LTE Router V	Global	4G FDD-LTE: B1, B2, B3, B4, B5, B7, B8, B12, B13, B18, B19, B20, B25, B26, B28 4G TDD-LTE: B38, B39, B40, B41 3G: B1, B2, B4,B5, B6, B8, B19 2G: B2, B3, B5, B8
800-099113 Option LTE Router H	Middle East, Africa, Korea, Thailand, India	4G FDD-LTE: B1 (2100 MHz),B3 (1800MHz), B5 (850MHz), B7 (2600MHz), B8 (900MHz), B20 (800 MHz) 4G TDD-LTE: B38, B40, B41 3G: B1 (2100 MHz), B5 ( 850 MHz), B8 (900 MHz) GSM/EDGE: B3 (900 MHz), B8 (1800 MHz)