Galaxy S25 eSIM Vietnam Setup: Complete Guide for 2025 Travelers

Setting up an eSIM on the Galaxy S25 in Vietnam is easier than ever, but many travelers still face challenges with activation, APN configuration, or dual SIM management. Whether you’re arriving in Hanoi, Da Nang, or Ho Chi Minh City, this guide walks you through every step of the Galaxy S25 eSIM Vietnam setup. It also links back to the guide for device eSIM setup in Vietnam.

📌 Why Use eSIM on Galaxy S25 in Vietnam?

eSIM removes the hassle of buying a physical SIM card at the airport or in downtown stores. Instead, you can receive a QR code via email and activate it instantly. The Galaxy S25 series (S25, S25+, and S25 Ultra) supports:

• Physical SIM + eSIM dual mode
• Dual eSIM (on most global/Asia variants)
• 5G support across Viettel, MobiFone, and Vinaphone

🛠️ Step-by-Step Galaxy S25 eSIM Vietnam Setup

1. Check Device Unlock: Go to Settings → Connections → SIM manager. If “Add eSIM” is missing, your phone may be carrier-locked.
2. Get a Vietnam eSIM Plan: Purchase online before departure. Plans are delivered instantly via QR code.
3. Scan the QR Code: Open Settings → Connections → SIM manager → Add eSIM → Scan QR.
4. Wait for Installation: Galaxy S25 will download and verify carrier details.
5. Set as Default Data SIM: Choose your Vietnam eSIM for mobile data, while keeping your home SIM for calls if needed.
6. Update APN if Needed:
   • Viettel: v-internet
   • MobiFone: m-wap
   • Vinaphone: m3-world
7. Enable 4G/5G: Go to Settings → Mobile networks → Preferred network → 4G/5G only.

📊 Real Traveler Case Studies

Case 1 – Business in Ho Chi Minh City: A traveler from Germany installed a Viettel eSIM (5GB/day, $14.90–$19.90). The eSIM activated within minutes, and 5G speeds reached 210 Mbps downtown according to Speedtest.

Case 2 – Holiday in Da Nang: A Singaporean family used MobiFone 20-day plan (4GB/day, $14.50). Dual SIM setup allowed them to keep their Singtel SIM for WhatsApp while relying on MobiFone 5G for streaming maps and booking apps.

Case 3 – Long-term Workation: An Australian digital nomad combined MobiFone 30-day Ultimate Plan (6GB/day, $18.50) with his Telstra SIM. Using “Dual SIM always on,” he managed both work calls and local internet seamlessly in Hanoi.

⚡ Common Setup Issues and Fixes

• “Unable to Activate eSIM”: Ensure your Galaxy S25 is updated to Android 15 (August 2025 patch fixed eSIM bugs).
• Data Not Working: Manually input APN as per carrier instructions.
• No 5G Option: Some imported devices only support certain bands. Viettel and MobiFone primarily use Band n78 (3500 MHz) and Band n41 (2500 MHz).
• Dual SIM Conflict: If calls drop, disable “Dual SIM always on” or set one SIM as default for calls.

📶 Vietnam 4G/5G Network Performance on Galaxy S25

Vietnam’s mobile infrastructure has expanded significantly. According to Ookla Global Index (Q2 2025), the country’s average 5G download speed is 210 Mbps.

• Hanoi: Viettel eSIM tested at 200 Mbps download / 30 Mbps upload.
• Da Nang: MobiFone eSIM reached 190 Mbps download.
• Ho Chi Minh City: Vinaphone eSIM clocked 180 Mbps.

🌐 Best Vietnam eSIM Plans for Galaxy S25

• Viettel eSIM (5GB/day, 15 or 30 days, $14.90 – $19.90): Best for strong coverage nationwide, including rural provinces.
• Vietnam eSIM 30 Days – 6GB/day + free net calls (Ultimate Plan 2025) ($18.50): Runs on MobiFone, includes local VN number and unlimited net calls.
• Vietnam eSIM 20 Days – 4GB/day (Best Plan 2025) ($14.50): Balanced option with VN number included, ideal for tourists.
• Vietnam eSIM with Phone Number (3GB/day, 10 / 15 / 30 days, $8.50 – $13.50): Budget-friendly, includes VN number; 15-day option has 30 minutes of free calls.

✅ Pre-Travel Checklist for Galaxy S25 eSIM Setup

• Unlock your device before arriving in Vietnam.
• Update Galaxy S25 to the latest Android security patch.
• Purchase your eSIM plan online before departure.
• Save your QR code offline in case Wi-Fi is unstable.
• Know your carrier’s APN settings (Viettel, MobiFone, Vinaphone).

For more device-specific instructions, see the eSIM Setup in Vietnam 2025 (iPhone, Samsung, Pixel, More).

Also see Samsung Galaxy official support for regional firmware updates.

📞 Need Help?

If you face any difficulties during your Galaxy S25 eSIM Vietnam setup, our support team can help troubleshoot and provide the right eSIM plan for your trip.

Contact: WhatsApp: +84 98 307 49 15 | LINE ID: anyaxiaoying | Email: info@govnsim.com