Field data · exclusive

Field tests: our real mobile speed measurements across Asia

Every point on the map is a real mobile speed measurement, taken on location with our eSIM. No estimates, no theoretical maps: numbers gathered in person.

39 measurements

Direct answer

Our field database contains 39 mobile measurements taken across 39 locations under real travel conditions. The most recent measurement was taken on June 30, 2026. Results can be explored by country, city, location and operator. They represent our measurement points and not nationwide coverage.

82.5

Median speed (Mbps)

Vietnam

Fastest country

82.5

Median latency (ms)

Measurements

Why field tests

Most eSIM comparisons rely on spec sheets and theoretical coverage maps. We do the opposite: we measure on the ground, where you will actually travel. A crowded airport, a remote beach, a moving metro do not deliver the speeds a map suggests.

Where we measured

Median speed by country

Median speed by operator

Aggregate detail

By country: Download (Mbps)

	Median	Mean	Min	Max	Tests
Vietnam	127.8	127.8	127.8	127.8	1
Thailand	112.0	138.8	17.9	478.0	19
Japan	79.9	93.0	18.6	221.0	12
South Korea	69.4	68.2	58.7	82.5	7

By country: Upload (Mbps)

	Median	Mean	Min	Max	Tests
Vietnam	45.6	45.6	45.6	45.6	1
South Korea	32.3	33.1	5.5	55.0	7
Thailand	31.7	38.4	5.8	99.9	19
Japan	13.8	15.1	3.6	29.3	12

By country: Latency (ms)

	Median	Mean	Min	Max	Tests
Japan	182.5	178.5	161	188	4
South Korea	149	149.7	147	153	3
Vietnam	89	89	89	89	1
Thailand	62.0	78.5	47	168	14

By operator: Download (Mbps)

	Median	Mean	Min	Max	Tests
AIS	142.5	150.6	17.9	478.0	16
Vinaphone	127.8	127.8	127.8	127.8	1
NTT Docomo	79.9	93.0	18.6	221.0	12
TrueMove H	71.1	75.7	46.5	109.6	3
LG U+	69.4	68.2	58.7	82.5	7

By operator: Upload (Mbps)

	Median	Mean	Min	Max	Tests
Vinaphone	45.6	45.6	45.6	45.6	1
AIS	32.8	41.0	5.8	99.9	16
LG U+	32.3	33.1	5.5	55.0	7
TrueMove H	21.9	24.7	8.3	43.8	3
NTT Docomo	13.8	15.1	3.6	29.3	12

By operator: Latency (ms)

	Median	Mean	Min	Max	Tests
NTT Docomo	182.5	178.5	161	188	4
TrueMove H	166.0	166	164	168	2
LG U+	149	149.7	147	153	3
Vinaphone	89	89	89	89	1
AIS	59.5	63.9	47	85	12

By city: Download (Mbps)

	Median	Mean	Min	Max	Tests
Chumphon	279.0	279.0	279.0	279.0	1
Thung Song	264.0	264.0	264.0	264.0	1
Bangkok	178.0	202.3	60.0	478.0	6
Krabi	167.0	167.0	167.0	167.0	1
Hua Hin	151.0	151.0	151.0	151.0	1
Nagoya	135.0	135.0	135.0	135.0	1
Ho Chi Minh City	127.8	127.8	127.8	127.8	1
Trang	112.0	112.0	112.0	112.0	1
Sapporo	103.8	103.8	18.6	189.0	2
Tokyo	88.5	103.8	40.9	221.0	7
Busan	82.5	82.5	82.5	82.5	1
Phuket	70.3	70.3	70.3	70.3	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
Koh Yao Noi	58.8	59.7	17.9	109.6	6
Shizuoka	27.5	27.5	27.5	27.5	1
Surat Thani	20.6	20.6	20.6	20.6	1
Osaka	19.3	19.3	19.3	19.3	1

By city: Upload (Mbps)

	Median	Mean	Min	Max	Tests
Chumphon	70.0	70.0	70.0	70.0	1
Bangkok	63.9	65.1	37.3	99.9	6
Ho Chi Minh City	45.6	45.6	45.6	45.6	1
Gangneung	39.5	39.5	32.3	46.8	2
Seoul	33.8	39.0	28.2	55.0	3
Trang	33.8	33.8	33.8	33.8	1
Krabi	31.7	31.7	31.7	31.7	1
Hua Hin	30.0	30.0	30.0	30.0	1
Busan	30.0	30.0	30.0	30.0	1
Thung Song	23.5	23.5	23.5	23.5	1
Surat Thani	21.7	21.7	21.7	21.7	1
Tokyo	17.0	18.8	9.4	29.3	7
Koh Yao Noi	15.4	19.6	5.8	43.8	6
Sapporo	14.8	14.8	3.8	25.9	2
Osaka	12.6	12.6	12.6	12.6	1
Phuket	11.4	11.4	11.4	11.4	1
DMZ Demilitarized	5.5	5.5	5.5	5.5	1
Nagoya	3.8	3.8	3.8	3.8	1
Shizuoka	3.6	3.6	3.6	3.6	1

By city: Latency (ms)

	Median	Mean	Min	Max	Tests
Tokyo	182.5	178.5	161	188	4
Koh Yao Noi	166.0	166	164	168	2
Busan	153	153	153	153	1
Gangneung	149	149	149	149	1
Seoul	147	147	147	147	1
Ho Chi Minh City	89	89	89	89	1
Chumphon	80	80	80	80	1
Bangkok	65.5	65.8	47	85	6
Surat Thani	64	64	64	64	1
Thung Song	60	60	60	60	1
Krabi	59	59	59	59	1
Trang	56	56	56	56	1
Hua Hin	53	53	53	53	1

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.

✓ Every published measurement comes from our team or a verified purchasing customer, and is manually reviewed before publication. No personal data (email, identity) is ever published.