💬 What is LINE OTP Vietnam number?

LINE, a popular messaging app across Asia, requires SMS OTP (One-Time Password) to verify a new account or change your registered phone number.
A LINE OTP Vietnam number means using a local +84 number — usually provided by an eSIM Vietnam phone number — to receive OTP codes while in Vietnam.

Without a Vietnam number, you may face issues registering LINE, especially if your roaming SIM cannot receive OTP SMS in Vietnam.

🔑 Why travelers and expats may need LINE OTP in Vietnam

• 🌐 Regional communication: LINE is widely used among Japanese, Korean, and Taiwanese communities in Vietnam. Many international students and expats rely on it daily.
• 📱 Account security: LINE requires OTP verification when reinstalling the app, switching devices, or recovering accounts.
• 🚫 Roaming limitations: OTP SMS to a foreign number may fail or incur high roaming charges.
• ✔️ Dual use: You may want to keep LINE on your home number but also register a new account with a Vietnam number for local contacts.

According to Statista, LINE had over 180 million monthly active users globally in 2024, with strong user bases in Japan, Taiwan, and Thailand. In Vietnam, LINE is especially relevant for students and expats from those countries who need a local number for account verification.

⚙️ How to set up LINE with Vietnam eSIM

Step-by-step

1. Buy a plan that includes an eSIM Vietnam phone number.
2. Activate the eSIM on your device (iPhone, Samsung, Pixel) and make sure SMS is enabled.
3. Download and open the LINE app.
4. Enter your Vietnam number (+84) when prompted.
5. Wait for OTP SMS. If it doesn’t arrive, choose “Call me” to receive OTP via voice call.
6. Enter the OTP to complete verification.

Tip: Store your Vietnam eSIM number in your phone contacts to avoid mistakes when entering it in LINE.

🔄 Keeping multiple accounts: Home number + Vietnam number

Many expats want to keep their original LINE account tied to their home number while also using a Vietnam number for local contacts. Options include:

• ✔️ Keep your primary LINE account linked to your home number.
• ✔️ Use the Vietnam number to register a second account, often via LINE Lite or dual-app features on Android.
• ✔️ Set up email login in LINE as backup so you can restore accounts even if OTP SMS fails temporarily.

This setup ensures smooth communication with both international and local communities in Vietnam.

👤 International student using LINE in Vietnam

Yuki, a Japanese student, joined a university exchange program in Ho Chi Minh City for six months. Her family and friends in Japan primarily used LINE to communicate. When she changed phones after arriving in Vietnam, she needed to reverify her account.

Her roaming Japanese SIM failed to receive the OTP SMS reliably. To fix this, Yuki bought an eSIM Vietnam phone number. She entered the new number in LINE, received the OTP instantly, and reactivated her account.
Yuki continued using LINE seamlessly to connect with both her Japanese friends and new local contacts in Vietnam. This highlights the value of having a LINE OTP Vietnam number for account stability.

🧩 Common OTP issues and fixes

🚀 Where to get a Vietnam eSIM with LINE OTP support

To reliably receive OTP for LINE in Vietnam, you need an eSIM with a local number. This ensures you can verify accounts, restore access, and stay connected to local contacts.
Get your plan here: Vietnam eSIM with phone number.

For further reading and detailed comparisons, see our guide:
Vietnam eSIM with Phone Number & OTP (2025 Guide).