However, in recent years it has struggled to keep up with Chinese rivals such as Huawei, Oppo and Xiaomi. It sold an estimated 23m phones last year, around 2 per cent of the global total, although it has remained the third biggest seller in the US, where it has around 10 per cent of the market.
LG said that its existing inventory of phones would continue to be available for some time and that it would provide software and security updates for a period.
It said leaving the smartphone business would allow it to focus on growing areas such as electric vehicle parts, robotics and smart home devices. It also said it would continue to work on areas such as 6G mobile network technology.
Apple and Samsung, the world's two biggest smartphone sellers, account for more than a third of sales, while a handful of Chinese manufacturers - Xiaomi, Oppo, Vivo and Huawei - follow, according to Counterpoint Research.
While Huawei's market share has slipped significantly in recent months due to US sanctions hitting its supply of processors, it has largely been supplanted by other Chinese companies.