How to Install eSIM
Installing an eSIM is quick and simple. Instead of inserting a physical SIM card, you download your eSIM profile directly to your compatible smartphone using a QR code.
Follow this step-by-step guide to install your eSIM on iPhone or Android and get connected to a mobile network while traveling.
Before Installing Your eSIM
Before you begin, make sure you have everything you need for a smooth installation.
📱
eSIM-Compatible Phone
Make sure your smartphone supports eSIM technology and is compatible with the eSIM plan you purchased.
🔓
Carrier-Unlocked Device
Your phone should be carrier-unlocked so it can connect to an eSIM from another mobile provider.
🌐
Internet Connection
Connect your phone to Wi-Fi or another reliable internet connection before starting the installation.
You Will Also Need
- Your eSIM QR code
- Your smartphone
- A stable Wi-Fi connection
- Your eSIM activation instructions
Important: Keep your QR code available during installation. Do not share your activation QR code with other people.
How to Install an eSIM on iPhone
Installing an eSIM on an iPhone usually takes only a few minutes.
Step 1: Open Settings
Open the Settings app on your iPhone.
Go to:
Settings → Cellular / Mobile Service → Add eSIM
Depending on your iOS version and region, the wording may be slightly different.
Step 2: Choose “Use QR Code”
Select Use QR Code when prompted.
Your iPhone will open the camera so you can scan your eSIM activation QR code.
Step 3: Scan Your eSIM QR Code
Point your iPhone camera at the QR code you received after purchasing your eSIM.
Make sure the entire QR code is visible on the screen.
Your iPhone should recognize the eSIM profile automatically.
Step 4: Add the Cellular Plan
Follow the instructions displayed on your iPhone and confirm that you want to add the cellular plan.
The eSIM profile will then be downloaded to your device.
Step 5: Label Your eSIM
Your iPhone may ask you to choose a label for the new line.
For example:
- Vietnam eSIM
- Travel
- Vietnam Data
Using a clear label makes it easier to identify your eSIM later.
Step 6: Choose Your Mobile Data Line
When prompted, select which SIM should be used for mobile data.
If you’re traveling internationally, select your Vietnam eSIM as the mobile data line.
You can keep your primary SIM active for calls and SMS if your device supports Dual SIM.
Step 7: Turn On Data Roaming if Required
Some travel eSIMs require Data Roaming to be enabled.
Go to:
Settings → Cellular → Your Vietnam eSIM → Data Roaming
Turn it on if your eSIM provider’s instructions require it.
How to Install an eSIM on Android
The exact menu names can vary depending on your phone manufacturer, Android version, and region.
Step 1: Open Settings
Open your phone’s Settings app.
Look for:
Connections → SIM Manager
or
Network & Internet → SIMs
The exact location may vary between Samsung, Google Pixel, Xiaomi, Motorola, and other Android devices.
Step 2: Select Add eSIM
Look for an option such as:
Add eSIM
or
Add Mobile Plan
Tap the option to begin setting up your eSIM.
Step 3: Scan the QR Code
Select the option to use a QR code and scan the QR code provided by your eSIM provider.
Keep your phone connected to Wi-Fi while the eSIM profile is being downloaded.
Step 4: Download the eSIM
Follow the instructions on your screen to download and install the eSIM profile.
The installation process usually takes only a few minutes.
Step 5: Name Your eSIM
Give your eSIM a recognizable name such as:
Vietnam eSIM
This makes it easier to identify your travel plan if you have multiple SIM or eSIM profiles.
Step 6: Select Your eSIM for Mobile Data
Open your SIM settings and select your Vietnam eSIM as the preferred SIM for mobile data.
You can normally keep your physical SIM active for calls and SMS.
Step 7: Enable Data Roaming if Required
If your eSIM provider requires roaming, open your eSIM settings and enable Data Roaming.
Follow the activation instructions provided with your eSIM plan.
How to Activate Your eSIM After Installation
Installing your eSIM and activating your mobile data service are two separate steps. Once you arrive at your destination, follow these instructions to connect to the local mobile network.
📱 Step 1
Open Cellular Settings
Open your phone’s SIM, Cellular, or Mobile Data settings.
📲 Step 2
Select Your Travel eSIM
Choose the eSIM profile you installed for your trip.
🟢 Step 3
Turn the eSIM On
Enable the eSIM line if it is currently switched off.
🌐 Step 4
Select Mobile Data
Set your travel eSIM as the default line for mobile data.
📡 Step 5
Enable Data Roaming
Turn Data Roaming on if your eSIM provider requires it.
Most travel eSIM plans require Data Roaming to connect to partner networks.
🔍 Step 6
Wait for Network Connection
Allow your phone a few moments to connect to a supported local network automatically.
📶 Step 7
Test Your Connection
Turn Wi-Fi off temporarily and try:
Opening a website
Using Google Maps
Sending a message
Checking your email
If everything loads correctly, your eSIM is ready to use.
✅ You’re Connected!
Once your phone connects to the local network, your travel eSIM is active and ready to use.
You can now browse the web, use navigation apps, message friends and family, and enjoy reliable mobile data throughout your trip.Turn Wi-Fi off temporarily and try:
When Should I Install My eSIM?
We recommend installing your eSIM before traveling, while you have access to a reliable Wi-Fi connection. This gives you plenty of time to complete the setup and avoid any last-minute issues at the airport.
💡 Important
Before installing your eSIM, check your provider’s activation policy.
Some eSIM plans begin their validity period when the eSIM first connects to a supported network, while others may start immediately after installation or activation.
Always review your plan details to avoid activating your data earlier than intended.
✈️ Before Your Flight
① Purchase Your eSIM
Choose the plan that matches your destination and travel dates.
② Receive Your QR Code
Your eSIM QR code is delivered instantly by email after purchase.
③ Install Your eSIM
Connect to Wi-Fi and scan the QR code to install your eSIM before leaving home.
🇻🇳 When You Arrive in Vietnam
① Turn On Your eSIM
Enable the eSIM line in your phone’s Cellular or Mobile Data settings.
② Select It for Mobile Data
Choose your travel eSIM as the preferred line for mobile data.
③ Enable Data Roaming
Turn on Data Roaming if required by your eSIM provider.
④ Connect to the Local Network
Wait a few moments while your phone connects automatically.
⑤ Start Using Mobile Data
Open Google Maps, browse the web, or message friends and family to confirm your connection.
✅ Recommended Travel Setup
For the smoothest experience:
✔ Buy your eSIM before departure.
✔ Install it while connected to Wi-Fi.
✔ Activate it only when you’re ready to use mobile data at your destination, according to your provider’s activation policy.
This helps you avoid airport queues, saves time on arrival, and ensures you’re connected as soon as you land.
Can I Keep My Physical SIM Active?
Yes. If your phone supports Dual SIM, you can usually keep your physical SIM active while using your Vietnam eSIM for mobile data.
This setup is ideal for international travelers because you can stay connected without removing your home SIM card.
Your Physical SIM
Keep your existing SIM active for everyday communication.
- 📞 Keep your home phone number
- 💬 Receive calls and SMS
- 🔐 Receive banking and verification codes
- 👨👩👧 Stay reachable on your regular number
Your Vietnam eSIM
Use your travel eSIM for fast mobile data throughout Vietnam.
- 🌐 Browse the web
- 🗺️ Navigate with Google Maps
- 🚕 Book rides with Grab and other ride-hailing apps
- 💬 Chat on WhatsApp, Messenger, Telegram, LINE, and more
Ready to Stay Connected in Vietnam?
Enjoy the convenience of keeping your home SIM active while using a Vietnam eSIM for reliable mobile data.
How to Check if Your eSIM Is Working
Once you’ve installed and activated your eSIM, it’s a good idea to confirm that everything is working correctly. Follow these quick checks to make sure your device is connected and ready to use.
📶 Check Network Signal
Look at the status bar on your phone and make sure your eSIM is connected to a supported mobile network.
What to look for:
- Network signal bars are visible
- A carrier name is displayed
- No “No Service” or “SOS Only” message
🌐 Test Mobile Data
Turn off Wi-Fi temporarily and test your internet connection.
Try one of these:
- Open a website
- Use Google Maps
- Refresh your email
- Send a message using WhatsApp or Messenger
If everything loads normally, your mobile data is working.
⚙️ Check Your SIM Settings
Open your phone’s SIM or Cellular settings and verify that your Vietnam eSIM is:
✅ Turned on
✅ Selected as your mobile data line
✅ Connected to a supported network
✅ Configured according to your eSIM provider’s instructions
🔄 Restart Your Phone
If your eSIM doesn’t connect immediately, restart your device.
After restarting:
- Wait a few minutes
- Allow the phone to reconnect automatically
- Check the signal again
- Test your mobile data once more
A restart often resolves temporary network registration issues.
✅ Everything Looks Good?
If you’ve completed the checks above and your mobile data is working, your Vietnam eSIM is successfully connected and ready to use.
You can now browse the web, use navigation apps, book rides, stream music, and stay connected throughout your trip.
❓ Still Having Trouble?
If your eSIM isn’t working after completing these checks:
- Confirm your phone supports eSIM
- Verify that your device is carrier-unlocked
- Check whether your plan requires Data Roaming to be enabled
- Review your provider’s activation instructions
- Contact customer support if the issue persists
eSIM Installation Troubleshooting
If your eSIM isn’t working after installation, don’t worry. Most installation issues are easy to fix by checking your device settings and following a few simple steps.
💡 Before You Start
Most eSIM installation problems are caused by one of the following:
- An incorrect or previously used QR code
- A poor internet connection
- A carrier-locked device
- An unsupported phone model
Check these first before contacting support.
If your phone can’t scan the QR code, try these troubleshooting steps.
✅ Check the QR Code
Make sure:
- The QR code is clear and not blurry.
- Your camera lens is clean.
- The QR code is fully visible on the screen.
- You’re using the correct QR code provided for your order.
📶 Check Your Internet Connection
Your phone should be connected to a stable Wi-Fi network during installation.
A weak or unstable connection can interrupt the setup process.
📱 Display the QR Code on Another Device
If the QR code is currently displayed on the same phone you’re trying to activate, move it to another screen.
For example:
- A laptop
- A tablet
- Another smartphone
Then scan it using your phone’s camera.
🔍 Adjust Camera Distance
Move your phone slightly closer to or farther away from the QR code until it comes into focus.
Avoid glare or reflections on the screen displaying the QR code.
⚠️ Already Used the QR Code?
Some eSIMs can only be installed once.
If you’ve already installed or deleted the eSIM, you may need a new activation QR code. Contact your eSIM provider for assistance.
✅ Still Having Trouble?
If the QR code still won’t scan after completing the steps above:
- Restart your phone.
- Update your device to the latest software version.
- Confirm your phone supports eSIM.
- Contact customer support if the problem continues.
Need More Help?
Our support team is here to help you get connected as quickly as possible.
Important Tips for eSIM Installation
💡 Don’t Delete Your eSIM
If your eSIM isn’t working, don’t immediately delete the eSIM profile.
Deleting an eSIM may prevent you from reinstalling it with the same QR code, depending on your provider’s policy.
📸 Keep Your QR Code
Save your eSIM QR code and activation information somewhere secure until your eSIM is successfully installed and working.
🌐 Use Reliable Wi-Fi
Install your eSIM while connected to a stable Wi-Fi network whenever possible.
✈️ Install Before Your Trip
Installing your eSIM before departure can save time and help you avoid searching for a SIM card store after landing.
Frequently Asked Questions
An eSIM (Embedded SIM) is a digital SIM that is built into your device. Instead of inserting a physical SIM card, you activate your mobile plan by scanning a QR code or downloading an eSIM profile.
Most recent smartphones from Apple, Samsung, Google, Motorola, Huawei, Xiaomi, OPPO, and other major brands support eSIM. Before purchasing, check our eSIM Compatible Phones page or your device settings to confirm compatibility.
We recommend installing your eSIM before you travel while you have access to a stable Wi-Fi connection. However, check your plan’s activation policy first, as some eSIMs begin their validity period when they connect to a supported network, while others may activate earlier.
Yes. If your phone supports Dual SIM, you can usually keep your physical SIM active for calls and SMS while using your Vietnam eSIM for mobile data. This allows you to keep your home number without swapping SIM cards.
After arriving in Vietnam:
- Turn on your eSIM.
- Select it as your mobile data line.
- Enable Data Roaming if required by your plan.
- Wait for your phone to connect to a supported local network.
- Test your connection by opening a website or using Google Maps.
If your eSIM isn’t working, check that:
- Your phone supports eSIM.
- Your device is carrier-unlocked.
- The eSIM is turned on.
- Mobile data is assigned to the eSIM.
- Data Roaming is enabled if required.
- You’re connected to a supported network.
If the issue continues, restart your phone or contact customer support.
You can install your eSIM before departure, but you should activate it according to your provider’s instructions. Many travel eSIMs are designed to begin working once they connect to a supported network in your destination.
Most travel eSIMs are data-only and do not include a local phone number. You can still make voice and video calls using internet-based apps such as WhatsApp, Messenger, Telegram, FaceTime, Skype, or LINE.
After your payment is confirmed, your eSIM QR code and installation instructions will be sent to your email. Delivery is usually instant, allowing you to install your eSIM within minutes.
This depends on your eSIM provider. Some eSIMs can only be installed once, while others allow reinstallation if you change or reset your device. If you need to reinstall your eSIM, contact customer support to check your plan’s policy.