3 Hong Kong is the first Three-branded company, leading to the development of other operations in different locations.

[3] It currently provides 5G, 4.5G, 4G LTE, 3G, GSM dual-band mobile telecommunications and Wi-Fi services through its own network infrastructure.

[4][5] The company started in 1984 as Hutchison Telecom Hong Kong, a telecommunications company that is granted licence to operate Advanced Mobile Phone Service (AMPS) cellular radio telephone network in Hong Kong.

Later on, they announced full coverage in the MTR, the transit railway system in Hong Kong.

[6] In 2017, 3 Hong Kong partnered with Razer, launching a new concept store – RazerStore in Causeway Bay.