Travel eSIM Vietnam

Our Vietnam travel eSIMs are purely data - no native voice or SMS services are included. If you need calling, use an internet - based app like WhatsApp or Messenger over your data connection.

Absolutely! You can install your Vietnam travel eSIM up to 30 days before departure. Installing early means it will automatically activate once you land.

Rest assured, installing before you leave won’t start your data or count down your plan days until you arrive in Vietnam.

If you see an activation error on iPhone when installing before arriving, you can ignore it-learn more in our eSIM Troubleshooting Guide.

No, the Vietnam eSIM is data-only and excludes voice/SMS numbers. You’ll have to rely on data-based messaging platforms like WhatsApp or Messenger for calling.

Your eSIM will activate automatically when you arrive in Vietnam. Though we recommend installing your Vietnam Travel eSIM before you arrive (this is different to activating).

To do this, scan the QR code we provide or install the eSIM directly from the ZenSim app while connected to WiFi. Once you arrive in Vietnam, your eSIM will activate automatically.

If you encounter any issues check out our eSIM Troubleshooting Guide or contact us directly ☺️

If installed before your trip, it will activate when you land in Vietnam.

If installed after arrival, it goes live right away.

Having issues? Check our eSIM Troubleshooting Guide or contact us for assistance.

If you want to avoid roaming headaches in Vietnam, a travel eSIM is the smarter pick:

Big Savings: Our local Vietnam eSIM data plans are priced for residents, not tourists who pay premium roaming costs.

Easy Plan Changes: Upgrade or downgrade your data allowance on the fly - no need for a new SIM.

Full Transparency: See your data usage in - app so you won’t run out unexpectedly or incur extra charges.

Not until you land in Vietnam. Installing ahead won’t start your plan; it goes live automatically when you arrive.

Make sure to install before you travel, as WiFi is required for setup and this way your Vietnam eSIM will be ready to use when you land.

If you encounter connection issues, see our eSIM Troubleshooting Guide or contact support.

Definitely! ZenSim supports eSIM usage in over 200 countries, so Vietnam is covered. If you need multi-country coverage, take a look at our regional eSIM options on the Travel eSIMs page.

Connection Problems: If your Vietnam eSIM isn’t loading data, check our troubleshooting post. If that doesn’t do it, contact us and we’ll get you fixed up.

Installation Questions: Need help installing your eSIM? Visit our how-to guide, or shoot us a message at Contact Us and we’ll sort it out.

Anything Else: Got other queries? Visit our contact page and we’ll be right with you.

Most ZenSim eSIMs can be topped up directly inside the app. If you ever need extra data, additional days, or want to include a new destination on the same eSIM, the Zen Garden is where you can do it.

Simply log in, tap into the Zen Garden, and you’ll find the option to top up right there.

Available top ups: For Vietnam, the top up plans are identical to the ones on the site, but you get a 10% discount.

Extending your stay: Planning to be away longer than 30 days? You can buy multiple top ups ahead of time. They activate one after another, so there’s no risk of replacing your current plan.

More than one country: Many eSIMs now let you attach extra countries through a top up. For example, while using a Europe eSIM you can add Singapore as an extra destination. It will activate automatically when you land in Singapore.

Single-country eSIMs like the Vietnam one are only valid within that country once activated.

For travel across borders, a regional plan might suit you better - our regional Travel eSIMs cover multiple countries in one.

Absolutely you can. After purchasing your Vietnam eSIM, share your unique referral URL with whoever you like and if they purchase you both save A$5 on your next purchases.

After purchase you can access your URL on the checkout confirmation screen or in the ZenSim app. For each new customer you refer to us you will be given a A$5 voucher to use on your next purchase.

Track your referral activity and access your unique referral link inside the ZenSim app. View the terms to learn more.

It might, but only if you're on an unlimited plan and only after you pass 3GB in a single day - which is well above what most people actually use (under 1GB a day on average).

Once you hit that 3GB mark, your speed drops to 1Mbps until midnight, then resets back to full speed for the new day.

If you're on a fixed-data plan like 10GB or 20GB, none of this applies - there's no daily limit, just use your data as needed until the plan runs out. We'll notify you beforehand, and you can top up right away in the ZenSim app.

It won't activate the moment you buy it - your Vietnam eSIM won't touch your data or days until you actually arrive, so there's no downside to installing it in advance.

As long as it's installed beforehand, it'll activate itself the second you touch down, and that's the moment your plan officially begins.

As for running out - your eSIM expires once your data or days are gone, whichever comes first (just the days, if you're on unlimited). Buy a 30-day plan and it'll run out 30 days after arrival in Vietnam, not 30 days after purchase.

Easy way to check - just run your phone through our eSIM compatibility checker and you'll know in seconds whether it'll work with our Vietnam eSIM and networks.

Still not sure, or something looks off? Reach out to us and we'll sort it out. And if it turns out your phone genuinely can't run the eSIM, our refund policy has you covered with a full refund - so there's no risk in grabbing a plan and giving it a go.

We sure do - it's covered under our 100% money back guarantee.

Cancelled trip, incompatible phone, or your travel plans just changing - all of these situations qualify.

Check out our refund policy for the full details, but the bottom line is: if you can't install or use the eSIM, you'll get every cent back.