📱 What is an eSIM Vietnam phone number?

Most travel eSIMs are data-only. They give you internet access but do not include a phone number — which means no SMS or voice calls. An eSIM Vietnam phone number is different: it gives you a real Vietnamese mobile number alongside data.

With this number you can:

• ✅ Receive OTP (one-time passwords) by SMS or call.
• ✅ Register for local apps like Grab and ShopeeFood.
• ✅ Use Zalo, the most popular messaging app in Vietnam.
• ✅ Update banking information or sign up for services requiring a +84 number.

Related guide: Vietnam eSIM with Phone Number & OTP .

🔑 Why you need a Vietnam number

Here are real scenarios where a Vietnam phone number makes a difference:

• 🚕 Grab & Be ride-hailing: Apps require OTP SMS during registration and sometimes when switching devices.
• 🍜 Food delivery: Services like Baemin, Now.vn, or ShopeeFood ask for SMS verification.
• 💬 Zalo: Almost 75 million users in Vietnam rely on Zalo for messaging. Registering requires a Vietnam number.
• 🏦 Banking: If you open a local account (for example, Vietcombank or Techcombank), the OTP for online transfers goes to your registered Vietnam number.

A 2024 report by We Are Social showed that 94% of Vietnamese internet users depend on SMS OTPs for daily app logins or transactions. Without a Vietnam number, you miss access to essential services.

⚙️ How to set up your Vietnam eSIM with phone number

The setup is simple but varies by device. Here are step-by-step instructions:

iPhone

1. Go to Settings → Cellular → Add eSIM.
2. Scan the QR code provided by your eSIM provider.
3. Label the line “Vietnam Number”.
4. Enable “Allow SMS” for this line.

Samsung Galaxy

1. Open Settings → Connections → SIM manager → Add eSIM.
2. Scan the QR code.
3. Set the Vietnam eSIM as default SMS line.

Google Pixel

1. Go to Settings → Network & Internet → SIMs → Add SIM.
2. Select “Download a SIM instead” and scan the QR code.
3. Enable SMS and calls for the Vietnam eSIM line.

Tip: On dual SIM devices, you can keep WhatsApp tied to your home number while using your Vietnam eSIM for OTPs and data.

📲 Receiving OTPs on popular apps

Grab

Grab requires SMS OTP for login. With an eSIM Vietnam phone number, you’ll get the OTP immediately and avoid registration issues.

Zalo

Zalo registration always requires a Vietnam number. After entering your +84 number, an SMS OTP confirms your account.

Banking

If you open a Vietnamese bank account, your OTP will go to the number you registered at the bank. This is mandatory for online transactions.

🧩 Common issues and solutions

🚀 Get your Vietnam eSIM with phone number

If you need OTP verification for Grab, Zalo, food delivery, or banking, a Vietnam eSIM with phone number is the right choice.
Plans are delivered instantly via QR code and can be activated on your chosen start date.

Learn more in our pillar guide: Vietnam eSIM with Phone Number & OTP (2025 Guide).