Fastest Mobile Award

VIETNAM’S Q3-Q4 2019 FASTEST MOBILE is Vietnam’s Speedtest Awards™ Winner for mobile NETWORK network speed. To win this award, Vinaphone achieved a Speed Score™ of 31.10, with average speeds of 33.06 Mbps for download and 18.75 Mbps for upload.

Speed Score Vietnam’s Mobile Tests on LTE-Capable Devices Ookla® compared user-initiated tests taken on the Speedtest iOS and Android mobile apps from all the major mobile carriers in Vietnam during the award 31.10 period to determine who showed the fastest mobile network speeds.

Test Speed Carrier Count Score

Vinaphone 340,386 31.10

Viettel 666,950 28.58

mobifone 370,103 21.23

162,306 4.64

Speed Score incorporates a measure of each provider’s download and upload speed to rank network speed performance. See next page for more detail.

Market Statistics

Test Count Average Download Speed: Average Upload Speed: Average Latency:

1,539,764 26.67 Mbps 15.69 Mbps 28 ms

Unique Devices Mbps Mbps ms 326,698 iPhone 7 Plus 23,229 Vinaphone 33.06 Vinaphone 18.75 Vinaphone 26

iPhone 6s 14,327 30.64 Viettel 17.76 Viettel 26

iPhone X 13,778 mobifone 22.69 mobifone 14.66 mobifone 29

iPhone 6s Plus 12,740 vietnamobile 5.14 vietnamobile 3.03 vietnamobile 42

iPhone 7 10,427 Fastest Mobile Award Vietnam Q3-Q4 2019

How Speed Score Works When analyzing fastest operators, Ookla solely considers top carriers (all carriers with 3% or more of total test samples in the market for the period). We then determine the fastest carrier using Speed Score which incorporates a measure of each provider’s download and upload speed to rank network speed performance (90% of the final Speed Score is attributed to download speed and the remaining 10% to upload speed). The Speed Score uses a modified trimean to demonstrate the download and upload speeds that are available across a provider’s network. We take speeds from the 10th percentile, 50th percentile (also known as the median), and 90th percentile, and combine them in a weighted average using a 1:2:1 ratio, respectively. We place the most emphasis on the download speeds and median speeds as those represent what most network providers’ customers will experience on a day-to-day basis.

Download 90th 50th 10th Upload 90th 50th 10th Carrier Name Trimean Percentile Percentile Percentile Trimean Percentile Percentile Percentile

Vinaphone 32.49 64.06 29.70 6.49 18.57 35.06 18.42 2.40

Viettel 29.82 63.75 25.35 4.83 17.48 34.57 16.14 3.05

mobifone 21.97 47.16 18.31 4.12 14.48 30.26 12.92 1.84

vietnamobile 4.83 10.79 3.87 0.80 2.92 5.49 2.75 0.69

City Network Speeds

City Carrier Speed Score Mbps Mbps

Ho Chi Minh City Vinaphone 32.58 34.66 18.64

Viettel 31.93 33.94 21.03

mobifone 19.37 20.54 14.49

vietnamobile 5.33 5.87 3.29

Hoàn Kiém Vinaphone 27.77 29.47 18.41

mobifone 24.94 26.78 16.20

Viettel 22.74 24.84 13.90

vietnamobile 3.12 3.31 2.74

Da Nang Vinaphone 38.08 40.21 22.60

Viettel 32.68 34.76 19.79

mobifone 20.53 21.71 14.55

vietnamobile 4.22 4.63 2.53

0 10 20 30 40 50

Methodology For more information on our methodology visit Speedtest.net/Awards