Incheon subway puts 5G Wi-Fi in all Line 1 and 2 cars, speeds up over 3x
In short
Incheon Transit Corporation, the Ministry of Science and ICT and the three mobile carriers said on 21 October that 5G-based Wi-Fi now runs in all cars on Incheon subway Lines 1 and 2. Average downlink speed rose from 83.2 Mbps to 215-285 Mbps, more than three times higher. Outlets described it as the first such service in the country.
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Incheon Transit Corporation said on 21 October that it had completed the subway Wi-Fi upgrade pilot project, carried out with the Ministry of Science and ICT and the three mobile carriers SK Telecom, KT and LG Uplus, and that 5G-based Wi-Fi now serves all cars on Incheon subway Lines 1 and 2. Several outlets described it as the first such service in the country. [ 1 , 2 , 4 , 5 , 7 , 9 ]
Under the project, Wi-Fi equipment based on LTE backhaul was replaced with 5G-based equipment. The work covered 358 cars: 272 on Line 1 (34 train sets) and 86 on Line 2 (43 train sets). Newsis and Kyunghyang Shinmun reported that access point devices and old power cables were also replaced. Maeil Business explained that backhaul is the link through which access points on a train exchange data with outside base stations, and that LTE backhaul has 20-40 MHz of bandwidth while 5G backhaul uses 100 MHz in the 3.5 GHz band. [ 1 , 2 , 4 ]
The corporation said average downlink speed rose from 83.2 Mbps to 215-285 Mbps, more than three times higher. Seoul Economic Daily said the 83.2 Mbps figure dated from a 2025 quality assessment. Newsis added that results can differ depending on the usage environment. [ 1 , 2 , 4 , 7 ]
To mark the launch, the ministry held an event on Line 2 on 21 October. Vice Minister Ryu Je-myeong, Rep. Lee Hoon-ki of the Democratic Party, Incheon Mayor Park Chan-dae and corporation president Choi Jeong-gyu attended, along with 11 citizen participants. They rode seven stations and tried web surfing, social media and video. The ministry said response was faster and that high-definition video played without interruption even with many users connected. A citizen participant quoted by Maeil Business said watching without buffering should make commuting more satisfying. [ 2 , 3 , 4 , 5 , 6 , 9 ]
Chosun Ilbo reported that 5G subway Wi-Fi had until now reached only some carriers' users on some routes, whereas on Lines 1 and 2 users of all three carriers can use it. Seoul Economic Daily said Incheon was ahead of Seoul and Busan, citing its smaller fleet of 358 cars and pressure from the National Assembly committee for better quality. [ 5 , 7 ]
Lee Hoon-ki said the aim is to cut citizens' telecom cost burden by guaranteeing the performance of free Wi-Fi, and he hopes the change spreads beyond Seoul and the capital region. Kyunghyang Shinmun reported that his 2025 audit measurements found speeds of around 10 Mbps for most carriers. Vice Minister Ryu said the ministry would give policy support, together with the carriers and regional transit corporations, so 5G subway Wi-Fi can spread nationwide. Maeil Business said the carriers' CEOs agreed in April with the science minister to improve subway Wi-Fi, and held a follow-up meeting in July. [ 1 , 3 , 4 , 5 , 6 , 7 , 9 ]
Why it matters
The ministry said it will give policy support so 5G subway Wi-Fi can spread nationwide, and Incheon is described as a pilot route for that. Rep. Lee Hoon-ki said the aim is to cut the telecom cost burden on citizens by making free subway Wi-Fi perform better.
Key facts
- Incheon Transit Corporation said it completed the subway Wi-Fi upgrade pilot project with the Ministry of Science and ICT and the three mobile carriers, and 5G-based Wi-Fi now covers all cars on Lines 1 and 2. [ 2 , 4 ]
- LTE backhaul-based Wi-Fi equipment was replaced with 5G-based equipment on a total of 358 cars: 272 on Line 1 (34 train sets) and 86 on Line 2 (43 train sets). [ 2 , 4 , 7 ]
- Average downlink speed rose from 83.2 Mbps to 215-285 Mbps, more than three times higher, according to the corporation. [ 1 , 2 , 4 , 7 ]
- The ministry held an experience event on 21 October on Line 2 between Unyeon and Incheon City Hall; participants tried web surfing, social media and video over seven stations. [ 3 , 5 , 6 , 9 ]
- Vice Minister Ryu Je-myeong said the ministry will give policy support so 5G-based subway Wi-Fi can expand nationwide. [ 3 , 5 , 6 , 9 ]
- Chosun Ilbo reported that Lines 1 and 2 are the first route where users of all three carriers (SK Telecom, KT, LG Uplus) get 5G-based subway Wi-Fi; earlier 5G subway Wi-Fi reached only some carriers' users on some routes. [ 5 ]
Confirmed by several sources
- 5G-based Wi-Fi service started in all cars of Incheon subway Lines 1 and 2, and several outlets called it the first in the country. [ 1 , 2 , 4 , 5 , 7 ]
- The ministry said the event on 21 October showed faster response when web surfing or using social media, and high-definition video played without interruption even with many users connected. [ 3 , 5 , 6 ]
- Average downlink speed rose from 83.2 Mbps to 215-285 Mbps, more than three times higher. [ 1 , 2 , 4 , 7 ]
- Lines 1 and 2 are described as the first pilot route where all three carriers have started 5G-based subway Wi-Fi. [ 3 , 5 , 9 ]
- Vice Minister Ryu Je-myeong, Rep. Lee Hoon-ki, Mayor Park Chan-dae and corporation president Choi Jeong-gyu took part in the event. [ 2 , 3 , 5 ]
Still unclear
- Where the event began on Line 2. The corporation's releases (reported by Newsis, Maeil Business and Seoul Economic Daily) say Unyeon rolling-stock depot; the ministry's account (Yonhap, Chosun Ilbo, ZDNet Korea) says Unyeon station.
- How much speeds will vary in everyday use. The speed figures come from the corporation's statement; Newsis noted that results may differ depending on the usage environment.
- When and where 5G subway Wi-Fi will be extended beyond Incheon. The ministry and the vice minister spoke of nationwide expansion but the documents give no schedule or list of lines.