Field data · South Korea

Mobile data speed in South Korea: our field tests

Direct answer

Our eSIM South Korea field tests include 7 measurements taken across 7 locations. The most recent measurement was taken on June 21, 2026. Median download speed is 69.4 Mbps and median latency is 148.5 ms. These results describe only the tested locations and not nationwide coverage.

Real mobile speed measurements taken on the ground in South Korea, with our own eSIM. 7 test(s) so far.

7 measurements

69.4

Median speed (Mbps)

Busan Seafront

Fastest place

148.5

Median latency (ms)

Measurements

Map of measurements

Complete results table

City	Exact location	Download	Upload	Ping	Jitter	Local operator	Detected network	Speedtest server	Server location	Date
Seoul	Incheon Chinatown	70.0 Mbps	55.0 Mbps	147 ms	Not detected	LG U+	Not detected	Google/MLab	Hong Kong	2026-06-21
Seoul	Incheon Airport ICN	71.9 Mbps	33.8 Mbps	148 ms	Not detected	LG U+	Not detected	Google/MLab	Hong Kong	2026-06-21
Dmz	Demilitarized zone	63.7 Mbps	5.54 Mbps	155 ms	Not detected	LG U+	Not detected	Google/MLab	Hong Kong	2026-06-17
Seoul	Beob wangnu temple	61.3 Mbps	28.2 Mbps	146 ms	Not detected	LG U+	Not detected	Google/MLab	Hong Kong	2026-06-16
Busan	Not detected	82.5 Mbps	30.0 Mbps	153 ms	Not detected	LG U+	Not detected	Not detected	Not detected	2026-06-13
Gangneung	Not detected	58.7 Mbps	32.3 Mbps	Not detected	Not detected	LG U+	Not detected	Not detected	Not detected	2026-06-09
Gangneung	Not detected	69.4 Mbps	46.8 Mbps	149 ms	Not detected	LG U+	Not detected	Not detected	Not detected	2026-06-08

By operator

Measurement detail

By city: Download (Mbps)

	Median	Mean	Min	Max	Tests
Busan	82.5	82.5	82.5	82.5	1
Seoul	70.0	67.7	61.3	71.9	3
Gangneung	64.1	64.1	58.7	69.4	2
DMZ Demilitarized	63.7	63.7	63.7	63.7	1

By city: Upload (Mbps)

	Median	Mean	Min	Max	Tests
Gangneung	39.5	39.5	32.3	46.8	2
Seoul	33.8	39.0	28.2	55.0	3
Busan	30.0	30.0	30.0	30.0	1
DMZ Demilitarized	5.5	5.5	5.5	5.5	1

By city: Latency (ms)

	Median	Mean	Min	Max	Tests
DMZ Demilitarized	155	155	155	155	1
Busan	153	153	153	153	1
Gangneung	149	149	149	149	1
Seoul	147	147	146	148	3

By operator: Download (Mbps)

	Median	Mean	Min	Max	Tests
LG U+	69.4	68.2	58.7	82.5	7

By operator: Upload (Mbps)

	Median	Mean	Min	Max	Tests
LG U+	32.3	33.1	5.5	55.0	7

By operator: Latency (ms)

	Median	Mean	Min	Max	Tests
LG U+	148.5	149.7	146	155	6

How we measure

Every measurement is taken on location, with our own eSIM, in real travel conditions: a precise place, a time, a connected network. We record download and upload speed, latency, then publish the result unedited.

The aggregates (median, mean, extremes) build up as we travel. The more measurements a destination has, the more reliable its median becomes. The median resists the extreme values of a single test better than the mean.