South Korea

Mobile networks and carriers in South Korea use 1 UMTS band, 5 LTE bands, and 2 5G NR bands. Find out if your unlocked phone or mobile device will work in South Korea. See the tables below for details.

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South Korea's mobile network has undergone significant development over the years. The country was one of the first to commercialize 5G services, with SK Telecom leading the pack with over 15 million subscribers. The adoption of 5G has been rapid, with a 19.3% increase in usage rate compared to the previous year, reflecting South Korea's strong commitment to technological innovation. The Ministry of Science and ICT, along with major mobile carriers SK Telecom, KT, and LG U+, have collaborated to make 5G services accessible in rural areas, marking a pivotal moment in telecommunications advancement. Additionally, the three Mobile Network Operators (MNOs) and the government have implemented National Roaming among 5G networks, aiming to rapidly expand coverage and ensure high-speed Internet access even in remote areas.

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Carriers

Name	# of frequency bands in use
KT	6
LG U+ (Uplus)	5
SK Telecom	7

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Frequencies in use

UMTS

Name	Interface
B1 (2100 MHz)	UMTS

LTE

Name	Interface
B1 (2100 MHz)	LTE
B3 (1800 MHz +)	LTE
B5 (850 MHz)	LTE
B7 (2600 MHz)	LTE
B8 (900 MHz)	LTE

5G NR

Name	Interface
N78 (3500 MHz)	5G NR
N257 (mmWave 28 GHz)	5G NR

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