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 149.0 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

149

Median latency (ms)

Measurements

Map of measurements

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
Busan	153	153	153	153	1
Gangneung	149	149	149	149	1
Seoul	147	147	147	147	1

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+	149	149.7	147	153	3

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.