The mobile phone industry in South Korea consists of domestic network infrastructure provision and the production of consumer mobile handsets.

In 1984, Korea Mobile Telecommunications Service, a subsidiary of Korea Telecom which was later renamed to SK Telecom, started its mobile communications service with the car phone.^[1]

• 1988, Korea Mobile Telecommunications Service started South Korea's first mobile phone service.^[2]
• 1996, Korea Mobile Telecommunications Service started the world's first cdmaOne service in Incheon. In the same year, Korea Telecom Freetel (KTF), which later merged with Korea Telecom, its parent company, began its service.^[3]
• 1997, Korea Mobile Telecommunications Service was sold to SK Group and changed its name to SK Telecom. In the same year, LG Telecom started its business.^[4]
• 2002, Korea Telecom Freetel merged Internet companies invested by Samsung Group and became KTF.

In 2009, KT was the first network to introduce the iPhone to South Korea.^[5] The origins of South Korea's domestic smartphone production industry can be traced to Samsung's release of their first smartphone, a reaction to Apple's iPhone, which was well-received by the South Korean population.^{[citation needed]}

Later, as the smartphone sector continued to grow, South Korean LG Electronics also joined this competition. Unlike Apple and Samsung, LG's business strategy was to make more affordable devices rather than with devices higher specifications. Eventually, LG shifted to offering phones with a better camera and higher screen quality which increased their cost of goods; however, the sales of their phones did not improve. ^[6]

LG announced its decision to exit the smart phone market in April, 2021 due to their continued net loss in this sector. Until now, Apple and Samsung have held the largest market shares, with LG trailing behind. Apple tried to capitalize on LG's exit of the smart phone market by advertising its products on LG's displays within markets.^[7][8] Samsung also took this opportunity to offer existing LG customers competitive deals on new Samsung phones such as running trade-in events for used LG smartphones.^{[citation needed]} Competition between the two manufacturers in the South Korean market is still on-going.^{[citation needed]}

• 2009, KTF merged with Korea Telecom.
• 2010, LG Telecom, LG Dacom, LG Powercom were merged into LG U Plus.
• 2012, KT shut down its 2G services and migrated to a 3G network.
• 2020, SKT shut down its 2G services and migrated to newer generation networks.
• New technology was developed such as WiBro and LTE ^{[citation needed]}

Current South Korean producers of mobile phones include:

• Samsung Electronics
• KT Tech

Former South Korean producers of mobile phones include:

• Pantech Curitel - ceased production in 2017^[9]
• LG Electronics - ceased production in 2021^[10]

Samsung and Apple have the largest market shares in Korea.^{[citation needed]}

There are three mobile phone service providers and they are currently deploying their 5G networks.

• Korea Telecom (KT) absorbed KT Freetel (KTF) in 2002 and offers services using HSPA and LTE networks.

• LG U Plus (LG U+), a member of LG Group, also provides CDMA2000 and LTE networks.

• SK Telecom (SKT) of SK Group also offers services using HSPA and LTE networks. In 2020 the CDMA2000 network was shut down.

As of 2004^[update] the market shares of the three companies were believed to be: SK Telecom's 50 percent, Korea Telecom's 30 percent and LG Telecom's 20 percent.^[11]

In South Korea, the Ministry of Information and Communication (MIC) is the telecommunications authority.

The Electronics and Telecommunications Research Institute (ETRI) supports Qualcomm's research and development of CDMA and CDMA2000 technology.

Regarding the Korean mobile phone industry's overseas experiences, SK Telecom has helped the first mobile phone service companies in Mongolia, Uzbekistan, Cambodia, etc. In China, it helped China Unicom's CDMA implementation, both technically and financially.^{[citation needed]}

• Telecommunications in South Korea
• List of telephone operating companies
• List of mobile network operators
• List of mobile phone makers
• Culture of South Korea: Cellular Phones

• Korea Telecom official site (Korean & English)
• LG U Plus official site(Korean & English)
• SK Telecom official site (Korean & English)