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Vietnam 5G eSIM Bands N78: Complete Guide for Travelers and Expats (2025)
Vietnam 5G eSIM bands N78 are one of the most widely deployed 5G frequencies in Vietnam, offering fast speeds and strong urban coverage. For travelers, digital nomads, and expats, understanding how the N78 band works is essential before purchasing a Viettel or Mobifone eSIM.
📡 What is 5G Band N78?
The 5G N78 band operates in the 3.3–3.8 GHz spectrum range (commonly referred to as the “C-band”). It is used by most global operators, including Vietnam’s Viettel, Mobifone, and Vinaphone. The N78 band offers a balance of:
- High capacity – better handling of crowded areas such as airports, malls, and city centers.
- Fast download/upload speeds – typically 300–900 Mbps in real-world tests in Vietnam.
- Moderate coverage – good in cities but limited reach in remote mountains and islands.
🌍 Vietnam 5G Coverage on N78
As of 2025, Vietnam’s Ministry of Information and Communications confirmed that Viettel and Mobifone use the N78 band for 5G trials and commercial rollout in major cities. Current deployment highlights:
| City/Region | Operator | 5G N78 Coverage Status |
|---|---|---|
| Hanoi | Viettel, Mobifone | Widespread coverage in urban core, speed tests 500–850 Mbps |
| Ho Chi Minh City | Viettel, Mobifone | Strong deployment, especially in District 1, 3, 7 |
| Da Nang | Viettel | Active hotspots near Han River, airport, tech parks |
| Tourist Sites (Ha Long, Ninh Binh, Hoi An) | Viettel only | Partial coverage, mostly 4G fallback outside towns |
📊Real Speed Test on Viettel 5G N78
During December 2024, a team of remote workers tested Vietnam 5G eSIM bands N78 in Hanoi using an iPhone 14 Pro with a Viettel eSIM. The results were:
- Download: 720 Mbps (near Hoan Kiem Lake)
- Upload: 86 Mbps
- Latency: 17 ms
In comparison, the same device on 4G LTE achieved only 65 Mbps download. This demonstrates how N78 significantly improves connectivity for data-heavy users like video calls and large file uploads.
📱 Compatible Devices with N78 in Vietnam
Most flagship devices from 2020 onward support band N78. Key models include:
- iPhone 12, 13, 14, 15 series
- Samsung Galaxy S20+, S21, S22, S23, Z Flip/Fold series
- Google Pixel 5, 6, 7, 8
- Huawei Mate 40+, P40+, with global firmware
⚠️ Note: Budget models sold in Vietnam (under $200) often lack N78 support, meaning they can only use 4G LTE or fall back to 5G n41 (if available).
⚖️ N78 vs Other 5G Bands in Vietnam
| Band | Frequency | Speed Potential | Coverage | Usage |
|---|---|---|---|---|
| N78 | 3.3–3.8 GHz | High (500–1000 Mbps) | Urban, dense areas | Current main 5G deployment |
| N41 | 2.6 GHz | Moderate (200–600 Mbps) | Wider coverage, less capacity | Secondary layer for Viettel |
| N258 | 26 GHz (mmWave) | Very high (>2 Gbps) | Extremely limited | Demo sites only in Hanoi/HCMC |
🛠️ Step-by-Step: How to Activate a Vietnam 5G eSIM on N78
- ✅ Check compatibility – iPhone XR+, Samsung S20+, Pixel 4+, and other eSIM-enabled 5G phones.
- ✅ Choose a 5G plan – Viettel 7-day or 30-day eSIM with 5G enabled.
- ✅ Purchase online – Get your QR code instantly from GoVnSIM.
- ✅ Install profile – iPhone: Settings → Mobile Data → Add eSIM → Scan QR. Android: Settings → SIM Manager → Add eSIM → Scan QR.
- ✅ Set as default – Assign eSIM as the primary mobile data line.
- ✅ Test connection – Run a speed test to confirm N78 is active.
✈️ Why N78 is Useful for Travelers
Travelers and expats benefit from N78 in daily scenarios:
- Streaming HD content without buffering.
- Running video calls with low latency.
- Navigating Google Maps even in crowded city centers.
- Uploading work files quickly during remote work.
🚀 Ready to Use 5G N78 in Vietnam?
Stay connected with a reliable Vietnam 5G eSIM plan that supports band N78. Whether you are visiting Hanoi, HCMC, or Da Nang, having a pre-activated eSIM ensures you land with 5G access in your pocket.
👉 Buy your Vietnam 5G eSIM now and experience true high-speed connectivity on the N78 band.
Contact: WhatsApp: +84 98 307 49 15 | LINE ID: anyaxiaoying | Email: info@govnsim.com