Hanoi is Vietnam's chaotic, beautiful, deeply historic capital — and a perfect base for exploring northern Vietnam including Halong Bay and Sapa. Here's your complete 2026 guide with honest eSIM coverage info.
eSIM Coverage in Northern Vietnam
| Network | Hanoi City | Halong Bay | Sapa Mountains |
|---|---|---|---|
| Viettel | ✅ Best 5G | ✅ Good near shore | ✅ Best mountain coverage |
| Vinaphone | ✅ Excellent | ✅ Good | ⚠️ Moderate |
| Mobifone | ✅ Good | ⚠️ Limited | ⚠️ Limited |
Our Vietnam eSIM uses Viettel — Vietnam's military-owned network with the most towers and best rural coverage. Essential for Halong Bay and Sapa.
Hanoi Old Quarter
The 36 Streets of Hanoi's Old Quarter are dense, narrow, and full of life — each street traditionally selling one product (Silk Street, Silver Street, Paper Street, etc.). Viettel 4G/5G is excellent throughout, even in the narrowest alleys. Perfect for navigating by Google Maps to find hidden pho spots and egg coffee cafés.
Must-Eat Hanoi Dishes (Use Data to Find Them)
- Phở Bò (beef noodle soup): Search "pho ga hanoi" or "pho bo hanoi" — locals queue at Phở Thin on Đinh Tiên Hoàng
- Bún Chả: Grilled pork with noodles. The dish Obama ate with Anthony Bourdain in Hanoi.
- Cà Phê Trứng (Egg Coffee): Café Đinh near Hoan Kiem Lake — hidden upstairs, Google Maps essential
- Bánh Mì: Bánh Mì 25 on Hàng Cá Street — famous queue, worth it
Halong Bay eSIM Coverage
Ha Long Bay is a UNESCO World Heritage Site of 1,600+ limestone islands. If you take an overnight cruise (the best way to experience it):
- On deck near the shore and Ha Long City: Viettel 4G works well.
- In the middle of the bay (more isolated islands): Signal drops on all networks. This is expected — you're on water surrounded by limestone karsts.
- Practical advice: Download Google Maps offline for the Quang Ninh province. Post your sunset photos when you return to port — the scenery is worth saving data for.
Getting Around Hanoi
- Grab app: Southeast Asia's Uber. Works brilliantly in Hanoi. Always use Grab over street taxis to avoid overcharging.
- Xe ôm (motorbike taxi): Use Grab Bike for short distances — 10x cheaper than taxis for 1km hops
- Walking: Old Quarter is best explored on foot — traffic is chaotic but pedestrians can navigate slowly
What Tourists Get Wrong in Hanoi
- 🏍️ Crossing the road: traffic doesn't stop, it flows around you. Walk slowly and steadily — don't run or hesitate.
- 💵 USD and VND both widely accepted, but VND gives better rates at restaurants and markets
- 🌡️ January–March is cool (15–20°C) and drizzly — pack layers. April and May are hot and humid before monsoon.
- 📱 Facebook and WhatsApp work fine in Vietnam — no restrictions
- 🍺 Bia Hoi (fresh draught beer at 25 cents a glass) corner is at the junction of Tạ Hiện and Lương Ngọc Quyến — iconic experience
🇻🇳 Vietnam eSIM — Viettel Network
Hanoi Old Quarter · Halong Bay · Sapa mountains · Ho Chi Minh City · From $4.99
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