How to Register Services with Vietnam eSIM Phone Number: The Ultimate Guide

How to register services with Vietnam eSIM phone number is one of the top questions for anyone visiting or staying in Vietnam. Whether you’re a tourist, expat, or business traveler, your Vietnam eSIM phone number unlocks a wide range of essential services: ride-hailing (Grab, Be), e-wallets (Momo, ZaloPay), banking apps, food delivery, social media, and more. This in-depth guide walks you through each step, shows you how to maximize your eSIM, and helps you avoid the typical mistakes new users make.

Why Your Vietnam eSIM Phone Number Is Essential

• OTP (One-Time Password) Authentication: Needed for banking, shopping, and booking apps.
• Ride-Hailing Apps: Register and book rides with Grab, Be, or Gojek.
• Food Delivery: Sign up for Now, Baemin, GrabFood, ShopeeFood.
• Social Media & Messaging: Use Zalo, Viber, WhatsApp, Facebook with a local number.
• Banking & E-Wallets: Register Momo, ZaloPay, ViettelPay, and get SMS alerts from your Vietnamese bank.

Without a local eSIM phone number, many Vietnamese apps and services will simply not let you register or verify your account. That’s why using GoVnSIM’s eSIM with phone number is the key to a smooth digital experience in Vietnam.

Step 1: Make Sure Your eSIM Is Active and Has a Phone Number

After purchasing your eSIM from GoVnSIM, you’ll receive a QR code via email. Follow the installation guide to activate your eSIM on your phone. Once activated, dial *101# or check in your phone’s SIM manager to confirm you have a Vietnam phone number (typically starting with 09, 03, or 07 for Viettel, Mobifone, or Vinaphone).

• If you need help activating, see our Vietnam eSIM installation guide.
• Your phone number will be visible in Settings > About phone > SIM status or similar menus, depending on your device.

Step 2: Registering Ride-Hailing Apps (Grab, Be, Gojek)

1. Download your preferred app from Google Play or App Store.
2. Open the app and tap Sign Up or Register.
3. Enter your Vietnam eSIM phone number. Make sure you use the full local format (e.g., 098xxxxxxx).
4. You will receive a 4–6 digit OTP via SMS. Enter this OTP in the app to verify your number.
5. Finish profile setup. You can now book rides and enjoy Vietnam’s digital transport!

Tip: If you don’t receive the OTP, double-check that your eSIM is active and can receive SMS. Sometimes it takes a few minutes for new numbers to register with app providers.

Step 3: Creating and Verifying E-Wallets (Momo, ZaloPay, ViettelPay)

E-wallets are huge in Vietnam for both locals and foreigners. Registration is straightforward:

• Download the e-wallet app (e.g., Momo, ZaloPay).
• Open the app, tap Register, and input your Vietnam eSIM phone number.
• Enter the OTP sent to your number. Complete your profile with your full name and passport details if required.
• Link to a bank account (optional but recommended for more features).

These e-wallets allow you to pay for food, rides, hotels, and even utilities, all via your eSIM phone number.

Learn More: Vietnam eSIM with Phone Number – The Definitive Guide

For a comprehensive overview of using your eSIM number for all digital services in Vietnam, see our pillar article: Vietnam eSIM with Phone Number: The Definitive Guide (2025).

Step 4: Registering for Social Apps (Zalo, WhatsApp, Viber)

1. Install Zalo, WhatsApp, or Viber from your app store.
2. Start registration with your Vietnam eSIM number.
3. Receive the OTP SMS, input it, and start using your app.
4. With Zalo, having a local number is mandatory to use most features.

Note: WhatsApp can be registered with any number, but Zalo (Vietnam’s #1 messenger) requires a Vietnamese phone number.

Common Problems and How to Solve Them

• Not Receiving OTP: Wait 2–3 minutes; try again. Ensure your device has good signal and roaming is off. If still not working, restart your phone.
• App Says Number Is Invalid: Check that you entered the correct local format, no spaces or dashes.
• eSIM Not Registered on Network: Make sure your eSIM profile is installed and active, and data is turned on.

Why GoVnSIM Makes It Easy

GoVnSIM provides you with pre-registered eSIMs using official procedures and local phone numbers from Viettel and Mobifone, Vietnam’s largest and most reliable operators. This ensures your number is ready for use with all major Vietnamese apps and services from day one.

Still unsure? GoVnSIM’s support team is available 24/7 via our website, WhatsApp (+84 98 307 49 15), and LINE (anyaxiaoying) to help with every step, including troubleshooting app registrations.

Pro Tips for Expats and Long-Stayers

• Update your eSIM info: If staying longer, update your phone number on all accounts (banks, e-wallets, delivery) to avoid service disruptions.
• Banking Security: Never share your OTP with anyone. Vietnamese banks and apps will never ask for your password via SMS.
• Lost or Switched Devices: Keep a backup of your eSIM QR code (email or printed copy) in case you change phones.

Step 5: Registering for Banking Services with Vietnam eSIM Phone Number

Having a Vietnamese eSIM phone number is a requirement if you want to use local banking apps or receive bank OTPs for secure transactions. Most major banks in Vietnam—including Vietcombank, BIDV, Techcombank, and ACB—require your phone number to be registered at their branch for security reasons.

1. Visit your bank branch in person with your passport and your phone (with the eSIM activated and the Vietnam number showing in your device).
2. Fill in the bank’s mobile number update form and request the staff to register your Vietnam eSIM number for SMS banking and mobile OTP services.
3. You will receive a confirmation SMS. Test by requesting an OTP in your banking app.
4. If you use multiple eSIMs or plan to switch phones, always notify the bank of the updated number to avoid disruptions.

Pro Tip: Always keep your eSIM active and with available balance (if required) to ensure you continue receiving banking OTP messages, especially if you’re traveling outside Vietnam.

Step 6: Registering for Government and Business Services

More Vietnamese government and business portals now accept registration and notifications via SMS to a local phone number. You may need to register for:

• Tax and business portals: For foreign residents or business owners, registering your eSIM number allows you to receive government codes, notifications, and e-invoices (National Public Service Portal).
• Visa, insurance, and health apps: Use your eSIM number to register for e-health cards, medical insurance, and even COVID-related tracking apps if required by authorities.

Advanced Troubleshooting: eSIM Phone Number Issues

• Not receiving banking OTP? Ensure your bank has your correct Vietnam eSIM phone number on file. Try restarting your device and turning airplane mode on/off.
• Issues with government apps? Double-check your number format. Some portals require the country code +84. For example, 098xxxxxxx → +8498xxxxxxx.
• Can’t receive SMS abroad? Some Vietnamese numbers may not support international SMS if you are outside Vietnam. Confirm with your eSIM provider (GoVnSIM supports most global SMS routing).

What You Can Register with a Vietnam eSIM Phone Number

Why GoVnSIM is Your Best Choice for Vietnam eSIM with Phone Number

When you get your Vietnam eSIM with phone number from GoVnSIM, you benefit from:

• 100% authentic numbers from Viettel & Mobifone
• Instant delivery and online activation support
• Pre-tested compatibility with all major Vietnamese apps
• 24/7 support in English, Chinese, and Vietnamese
• Easy to top-up, renew, and manage from overseas

Unlike many random eSIM sellers, GoVnSIM specializes in supporting international visitors, digital nomads, and expats in Vietnam. No hidden charges, no fake numbers—just reliable, secure, and convenient service for every need.

FAQs: How to Register Services with Vietnam eSIM Phone Number

• Can I use my eSIM phone number to open a Vietnamese bank account?
  Yes. Just make sure the number is registered in your name or shown in your passport at the bank. Most banks will verify with an OTP.
• Is it safe to use a Vietnam eSIM for financial transactions?
  Absolutely, as long as you keep your device and eSIM secure. Never share OTP codes with anyone.
• Can I receive international SMS (for apps like WeChat, Telegram)?
  Most Viettel and Mobifone numbers provided by GoVnSIM support this, but always check before relying on your number for important overseas verification.
• How long does it take to activate services?
  For most apps, registration is instant. For banks and government, allow 1–2 working days after visiting the branch.

• Vietnam eSIM with Phone Number: The Definitive Guide (2025)
  
  
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  Vietcombank: VCB Digibank Registration (Official)
  
  
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  Vietnam National Public Service Portal (English)
  
  

Need a Vietnam eSIM Phone Number Now? Contact GoVnSIM

For instant eSIM with Vietnam phone number, contact GoVnSIM today:
WhatsApp: +84 98 307 49 15
LINE: anyaxiaoying
Website: https://govnsim.com/
Our team is ready to help you register every service, answer questions, and support you in English, Chinese, and Vietnamese!