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Will Samsung Galaxy S21 Ultra work in Korea (South)?

Check the compatibility of frequencies, bands and network coverage of Samsung Galaxy S21 Ultra with the operators of Korea (South)

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Compatibility of Samsung Galaxy S21 Ultra in Korea (South)

Samsung Galaxy S21 Ultra View datasheet

Coverage in Korea (South)

Market	Version	Coverage
Global	12GB · 128GB · SM-G998B 12GB · 256GB · SM-G998B 16GB · 512GB · SM-G998B	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 5 of 5 B1 (2100) B3 (1800) B5 (850) B7 (2600) B8 (900) 3G 1 of 1 B1 (2100) 2G Not available
N. America	12GB · 128GB · SM-G998U No official network bands 12GB · 256GB · SM-G998U No official network bands 16GB · 512GB · SM-G998U No official network bands	5G 0 of 2 n78 (3500) n257 mmWave (28GHz) 4G 5 of 5 B1 (2100) B3 (1800) B5 (850) B7 (2600) B8 (900) 3G 1 of 1 B1 (2100) 2G Not available
China	12GB · 256GB · SM-G9980 16GB · 512GB · SM-G9980	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 5 of 5 B1 (2100) B3 (1800) B5 (850) B7 (2600) B8 (900) 3G 1 of 1 B1 (2100) 2G Not available
Korea	12GB · 256GB · SM-G998N 16GB · 512GB · SM-G998N	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 5 of 5 B1 (2100) B3 (1800) B5 (850) B7 (2600) B8 (900) 3G 1 of 1 B1 (2100) 2G Not available

See 5G compatible phones from Korea (South)See 4G compatible phones from Korea (South)

There is not need supporting all bands for having coverage in the different types of networks. For example, if it does not support one band, could make you not to have 4G coverage in rural areas or having bad coverage inside buildings, but having it without problems in cities.

In this page we are going to show you the compatibility of Samsung Galaxy S21 Ultra with the mobile networks of Korea (South) and with the telephony operators that provide service in Korea (South).

Keep in mind that to have a perfect coverage, the ideal thing is that the Samsung Galaxy S21 Ultra has all the frequencies for all networks, that are used in Korea (South), although if the Samsung Galaxy S21 Ultra lacks any of the frequency bands used, it does not mean that it does not work on that network, but coverage could be limited to certain areas.

Compatibility of Samsung Galaxy S21 Ultra with operators of Korea (South)

Samsung Galaxy S21 Ultra View datasheet

KT

Market	Version	Coverage
Global	12GB · 128GB · SM-G998B 12GB · 256GB · SM-G998B 16GB · 512GB · SM-G998B	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 3 of 3 B1 (2100) B3 (1800) B8 (900) 3G 1 of 1 B1 (2100) 2G Not available
N. America	12GB · 128GB · SM-G998U No official network bands 12GB · 256GB · SM-G998U No official network bands 16GB · 512GB · SM-G998U No official network bands	5G 0 of 2 n78 (3500) n257 mmWave (28GHz) 4G 3 of 3 B1 (2100) B3 (1800) B8 (900) 3G 1 of 1 B1 (2100) 2G Not available
China	12GB · 256GB · SM-G9980 16GB · 512GB · SM-G9980	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 3 of 3 B1 (2100) B3 (1800) B8 (900) 3G 1 of 1 B1 (2100) 2G Not available
Korea	12GB · 256GB · SM-G998N 16GB · 512GB · SM-G998N	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 3 of 3 B1 (2100) B3 (1800) B8 (900) 3G 1 of 1 B1 (2100) 2G Not available

See 5G compatible phones from Korea (South)See 4G compatible phones from Korea (South)

LG U+ (Uplus)

Market	Version	Coverage
Global	12GB · 128GB · SM-G998B 12GB · 256GB · SM-G998B 16GB · 512GB · SM-G998B	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 3 of 3 B1 (2100) B5 (850) B7 (2600) 3G Not available 2G Not available
N. America	12GB · 128GB · SM-G998U No official network bands 12GB · 256GB · SM-G998U No official network bands 16GB · 512GB · SM-G998U No official network bands	5G 0 of 2 n78 (3500) n257 mmWave (28GHz) 4G 3 of 3 B1 (2100) B5 (850) B7 (2600) 3G Not available 2G Not available
China	12GB · 256GB · SM-G9980 16GB · 512GB · SM-G9980	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 3 of 3 B1 (2100) B5 (850) B7 (2600) 3G Not available 2G Not available
Korea	12GB · 256GB · SM-G998N 16GB · 512GB · SM-G998N	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 3 of 3 B1 (2100) B5 (850) B7 (2600) 3G Not available 2G Not available

See 5G compatible phones from Korea (South)See 4G compatible phones from Korea (South)

SK Telecom

Market	Version	Coverage
Global	12GB · 128GB · SM-G998B 12GB · 256GB · SM-G998B 16GB · 512GB · SM-G998B	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 4 of 4 B1 (2100) B3 (1800) B5 (850) B7 (2600) 3G 1 of 1 B1 (2100) 2G Not available
N. America	12GB · 128GB · SM-G998U No official network bands 12GB · 256GB · SM-G998U No official network bands 16GB · 512GB · SM-G998U No official network bands	5G 0 of 2 n78 (3500) n257 mmWave (28GHz) 4G 4 of 4 B1 (2100) B3 (1800) B5 (850) B7 (2600) 3G 1 of 1 B1 (2100) 2G Not available
China	12GB · 256GB · SM-G9980 16GB · 512GB · SM-G9980	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 4 of 4 B1 (2100) B3 (1800) B5 (850) B7 (2600) 3G 1 of 1 B1 (2100) 2G Not available
Korea	12GB · 256GB · SM-G998N 16GB · 512GB · SM-G998N	5G 1 of 2 n78 (3500) n257 mmWave (28GHz) 4G 4 of 4 B1 (2100) B3 (1800) B5 (850) B7 (2600) 3G 1 of 1 B1 (2100) 2G Not available

See 5G compatible phones from Korea (South)See 4G compatible phones from Korea (South)

Bands of Samsung Galaxy S21 Ultra

Samsung Galaxy S21 Ultra View datasheet

5G

Market	Version	Bands
Global	12GB · 128GB · SM-G998B 12GB · 256GB · SM-G998B 16GB · 512GB · SM-G998B	n1 (2100) n20 (800) n28a (700) n28b (700) n3 (1800) n38 (2600) n40 (2300) n41 (2500) n5 (850) n66 (1700) n7 (2600) n77 (3700) n78 (3500) n8 (900)
N. America	12GB · 128GB · SM-G998U 12GB · 256GB · SM-G998U 16GB · 512GB · SM-G998U	n2 (1900 PCS) n25 (1900) n260 mmWave (39GHz) n261 mmWave (28GHz) n41 (2500) n5 (850) n66 (1700) n71 (600)
China	12GB · 256GB · SM-G9980 16GB · 512GB · SM-G9980	n1 (2100) n28a (700) n28b (700) n41 (2500) n78 (3500) n79 (4700)
Korea	12GB · 256GB · SM-G998N 16GB · 512GB · SM-G998N	n77 (3700) n78 (3500)

4G LTE

Market	Version	Bands
Global	12GB · 128GB · SM-G998B 12GB · 256GB · SM-G998B 16GB · 512GB · SM-G998B	B1 (2100) B12 (700) B13 (700) B17 (700) B18 (800) B19 (800) B2 (1900) B20 (800) B25 (1900+) B26 (850) B28a (700) B28b (700) B3 (1800) B32 (1500) B38 (TDD 2600) B39 (TDD 1900) B4 (1700/2100 AWS 1) B40 (TDD 2300) B41 (TDD 2500) B5 (850) B66 (1700/2100) B7 (2600) B8 (900)
N. America	12GB · 128GB · SM-G998U 12GB · 256GB · SM-G998U 16GB · 512GB · SM-G998U	B1 (2100) B12 (700) B13 (700) B14 (700) B18 (800) B19 (800) B2 (1900) B20 (800) B25 (1900+) B28a (700) B28b (700) B3 (1800) B30 (2300) B38 (TDD 2600) B39 (TDD 1900) B4 (1700/2100 AWS 1) B40 (TDD 2300) B41 (TDD 2500) B46 (TDD 5200) B48 (TDD 3600) B5 (850) B66 (1700/2100) B7 (2600) B71 (600) B8 (900)
China	12GB · 256GB · SM-G9980 16GB · 512GB · SM-G9980	B1 (2100) B12 (700) B13 (700) B18 (800) B19 (800) B2 (1900) B20 (800) B25 (1900+) B26 (850) B28a (700) B28b (700) B3 (1800) B34 (TDD 2100) B38 (TDD 2600) B39 (TDD 1900) B4 (1700/2100 AWS 1) B40 (TDD 2300) B41 (TDD 2500) B5 (850) B7 (2600) B8 (900)
Korea	12GB · 256GB · SM-G998N 16GB · 512GB · SM-G998N	B1 (2100) B12 (700) B13 (700) B17 (700) B18 (800) B19 (800) B2 (1900) B20 (800) B25 (1900+) B26 (850) B28a (700) B28b (700) B3 (1800) B38 (TDD 2600) B39 (TDD 1900) B4 (1700/2100 AWS 1) B40 (TDD 2300) B41 (TDD 2500) B5 (850) B66 (1700/2100) B7 (2600) B8 (900)

3G

Market	Version	Bands
Global	12GB · 128GB · SM-G998B 12GB · 256GB · SM-G998B 16GB · 512GB · SM-G998B	B1 (2100) B2 (1900) B4 (1700/2100 AWS A-F) B5 (850) B8 (900)
N. America	12GB · 128GB · SM-G998U 12GB · 256GB · SM-G998U 16GB · 512GB · SM-G998U	B1 (2100) B2 (1900) B4 (1700/2100 AWS A-F) B5 (850) B8 (900)
China	12GB · 256GB · SM-G9980 16GB · 512GB · SM-G9980	B1 (2100) B2 (1900) B5 (850) B8 (900)
Korea	12GB · 256GB · SM-G998N 16GB · 512GB · SM-G998N	B1 (2100) B2 (1900) B4 (1700/2100 AWS A-F) B5 (850) B8 (900)

2G

Market	Version	Bands
Global	12GB · 128GB · SM-G998B 12GB · 256GB · SM-G998B 16GB · 512GB · SM-G998B	B2 (1900) B3 (1800) B5 (850) B8 (900)
N. America	12GB · 128GB · SM-G998U 12GB · 256GB · SM-G998U 16GB · 512GB · SM-G998U	CDMA BC0 (800) CDMA BC1 (1900) CDMA BC10 (800 Secondary) B2 (1900) B3 (1800) B5 (850) B8 (900)
China	12GB · 256GB · SM-G9980 16GB · 512GB · SM-G9980	B2 (1900) B3 (1800) B5 (850) B8 (900)
Korea	12GB · 256GB · SM-G998N 16GB · 512GB · SM-G998N	B2 (1900) B3 (1800) B5 (850) B8 (900)

Check coverage of Samsung Galaxy S21 Ultra in other countries

Global • 12GB • 128GB • SM-G998B

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