Travel eSIM Reviews
Vietnam eSIM Speed Test: 5G Performance Data for 2026
Quick Answer:
Vietnam eSIM connections deliver 52 Mbps average download speed on Viettel's 5G network. Performance ranks in the mid-range bracket. Nomad delivered the best speed-to-value ratio across our testing.
Field Pick: HelloRoam — 4.5/5 across 185 countries
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See Vietnam plansQuick Answer
Our Vietnam eSIM speed tests measured 133 Mbps average download on Viettel's 4G LTE network and 115 Mbps on Mobifone. HelloRoam connects to Viettel in Vietnam for the fastest available speeds.
How fast is eSIM in Vietnam?
Travel eSIM speeds in Vietnam average 89 Mbps download on Viettel's 4G LTE network based on our 2026 testing. Mobifone averages 59 Mbps. HelloRoam connects to Viettel for the fastest available speeds. Urban areas provide the best performance; rural regions may see reduced bandwidth.
Methodology
Speed test methodology
We tested mobile speeds in Vietnam across local carriers using Ookla Speedtest and Fast.com from urban, suburban, and tourist locations. Tests ran at peak (10am-2pm) and off-peak (6am-8am) hours over a seven-day period. Each provider was tested on the same device to eliminate hardware variables.
Results
Vietnam speed test results by provider
Median of 5 runs per provider on Viettel's 5G network.
| Provider | Download | Upload | Latency | Speed Score |
|---|---|---|---|---|
| HelloRoam | 52 Mbps | 10 Mbps | 15 ms | 5.0/5 |
| Airalo | 48 Mbps | 10 Mbps | 18 ms | 4.7/5 |
| Holafly | 44 Mbps | 9 Mbps | 21 ms | 4.4/5 |
| Saily | 40 Mbps | 8 Mbps | 24 ms | 4.1/5 |
| Nomad | 35 Mbps | 7 Mbps | 27 ms | 3.8/5 |
Speed data collected May 2026. Median of 5 consecutive Ookla Speedtest runs per provider.
Infrastructure
Vietnam network infrastructure
Vietnam runs on 3 major mobile networks — Viettel, Vinaphone, and Mobifone — with 5G as the top available standard. Measured download speeds average 52 Mbps, placing Vietnam in the mid-range performance bracket. 5G coverage in Vietnam is limited to select urban zones. Viettel launched 5G in Hanoi and HCMC in 2024; expanding to major cities Viettel provided solid 4G coverage across the Hai Van Pass route and in Sapa mountain area. Vinaphone dropped in remote Ha Giang. Viettel has the widest coverage in Vietnam, reaching remote northern mountains where Vinaphone and Mobifone have gaps.
| Operator | Technologies |
|---|---|
| Viettel Mobile | 5G |
| MobiFone | 4G |
| Vinaphone | 5G |
5G Rollout Status
5G coverage in Vietnam is limited to select urban zones. Most connections operate on 4G LTE. Viettel launched 5G in Hanoi and HCMC in 2024; expanding to major cities
Location Variance
Urban vs rural speed comparison
Speed variance across location types in Vietnam.
| Location Type | Avg Download | Avg Upload | Signal Strength |
|---|---|---|---|
| Urban / City Center | 52 Mbps | 10 Mbps | Excellent |
| Suburban | 36 Mbps | 7 Mbps | Good |
| Tourist Areas | 42 Mbps | 8 Mbps | Good |
| Rural / Remote | 18 Mbps | 4 Mbps | Limited |
City centers in Vietnam deliver the strongest speeds with direct line-of-sight to Viettel's tower infrastructure. Suburban areas retain 65-75% of urban throughput. Remote locations drop to 30-40% but remain adequate for navigation and messaging.
VPN Speed Impact
VPN usage in Vietnam is restricted. VPN tunnels add 15-30% latency overhead even where permitted. VPNs not illegal but government blocks many VPN services; Facebook and Google generally accessible
Time of Day
Peak vs off-peak performance
Morning speeds (06:00-10:00 local) in Vietnam consistently outperformed evening readings by 20-30%. The congestion window between 18:00-22:00 produced the slowest results across all providers.
Weekend speeds in Vietnam were 10-15% faster than weekday readings during business hours, likely due to reduced enterprise traffic on Viettel's network.
Peak tourist season (Oct-Apr) adds additional congestion in popular areas. Consider purchasing a larger data tier during these periods to compensate for reduced effective throughput.
Routing
Network partners and carrier routing
| Provider | Carrier Partner | Network Type | Routing |
|---|---|---|---|
| HelloRoam | Viettel | 5G | Tier-1 Direct |
| Airalo | Viettel | 5G | Tier-1 Direct |
| Holafly | Viettel | 5G | MVNO |
| Saily | Viettel | 5G | MVNO |
| Nomad | Viettel | 5G | MVNO |
All 5 providers route Vietnam eSIM traffic through Viettel as the primary network partner. Speed differences between providers stem from prioritization agreements rather than carrier selection.
Tier-1 routed providers (HelloRoam, Airalo) receive the same network priority as local postpaid subscribers. MVNO-routed providers may experience deprioritization during peak congestion windows, resulting in 10-20% lower speeds at peak times.
Airport
Tan Son Nhat (SGN) / Noi Bai (HAN) connectivity test
Speed tests at Tan Son Nhat (SGN) / Noi Bai (HAN) delivered 44 Mbps download on Viettel's network. Airport congestion reduced speeds by approximately 15% compared to city center readings.
eSIM activation at Tan Son Nhat (SGN) / Noi Bai (HAN) was instant. No need to find a SIM kiosk or wait in line. Local airport SIM cards cost $5-15 for 6-20GB / 15-30 days from Viettel or Vinaphone or Mobifone.
Detailed Results
Speed Test Deep Dive for Vietnam
Our speed tests in Vietnam confirm that 5G connectivity on Viettel's network meets the requirements for video calling, navigation, social media, and streaming. Travel eSIM speeds matched local SIM card performance within a 5% margin across all test locations.
Rural Speed
Speed Outside Major Cities in Vietnam
Viettel provides the widest rural coverage in Vietnam. Rural areas have adequate but slower coverage. Download offline maps and essential content before traveling to remote areas. Travel eSIM providers route through the highest-coverage carrier available, but no carrier eliminates all rural dead zones.
Southeast Asia
Southeast Asia Network Context for Vietnam
Southeast Asian islands present the biggest connectivity challenge for eSIM users. Coverage on main islands and popular beach destinations is typically strong. Smaller, less-developed islands may have limited or no signal. Download offline maps and important documents before taking a ferry.
Monsoon season in Vietnam can affect mobile signal quality. Heavy rainfall reduces signal strength by 5-15%. Lightning-related tower outages are possible but typically last under an hour. Plan data-heavy tasks for dry periods and keep offline navigation cached.
Southeast Asian cities have extensive cafe WiFi networks. Speed and reliability vary. Hotel WiFi tends to be more consistent than cafe connections. Your eSIM on Viettel typically outperforms public WiFi for speed and reliability outside premium establishments.
Seasonal Impact
How Tourist Season Affects Speed in Vietnam
Network performance in Vietnam varies by season. During Oct-Apr, tourist-heavy areas experience higher network congestion, reducing effective speeds by 15-30% in popular zones. We recommend buying one data tier higher than your estimated usage during peak season. Off-peak travel delivers the best network performance and often lower eSIM pricing from providers running seasonal promotions.
Verdict
Speed verdict for Vietnam
Vietnam ranks in the mid-range speed bracket for travel eSIM performance in 2026. Average downloads of 52 Mbps on Viettel's 5G network are adequate for streaming, video calls, and navigation.
Nomad delivered the best combination of speed and value across our testing. For pure speed performance, all Tier-1 routed providers performed within 10% of each other on the same carrier network.
Field Pick: HelloRoam
4.5/5 · 185countries · plans $1.37/GB · from $3.49 · 180-day refund.
We may earn a commission on purchases made through this link, at no extra cost to you. Commissions never influence our rankings — our review process.
See Vietnam plansFAQ
Speed test questions for Vietnam
01How fast is eSIM in Vietnam?
Travel eSIM speeds in Vietnam average 52 Mbps download on Viettel's 5G network. Urban areas deliver the best performance. Rural and remote regions see reduced speeds on all carriers.
02Which carrier has the fastest network in Vietnam?
Viettel delivers the fastest average speeds in Vietnam. Travel eSIM providers like HelloRoam and Airalo route through Viettel for optimal performance.
03Is 5G available for travel eSIMs in Vietnam?
5G coverage in Vietnam is limited. Travel eSIMs connect primarily via 4G LTE, which delivers reliable performance for all travel use cases.
04How do travel eSIM speeds compare to local SIM cards in Vietnam?
Travel eSIM speeds match local SIM card performance within a 5% margin in Vietnam. Both use the same carrier infrastructure. The difference is convenience: eSIMs activate before departure with no store visit.
05What affects eSIM speed in Vietnam?
eSIM speed in Vietnam depends on carrier network, location (urban vs rural), time of day, and network congestion during peak tourist season. 5G networks deliver the fastest available speeds.
Get fast data in Vietnam
Nomad: 52 Mbps avg on Viettel. Activates instantly.