An eSIM can work in Vietnam when the phone supports eSIM, is carrier-unlocked and the purchased plan explicitly includes Vietnam. Having an eSIM-capable device does not make every existing profile valid in the country.
Travellers should check both sides of compatibility: the handset must accept the profile, and the plan must connect through a supported Vietnamese partner network.
NoveSIM Vietnam plans are data-only. They support online calls and messaging through apps but do not include a Vietnamese number, ordinary voice minutes or carrier SMS.
Quick answer: confirm your exact model on the compatibility list, verify that it is unlocked and choose a plan listing Vietnam. Install before departure on reliable Wi-Fi; after landing, select the eSIM for data, enable Data Roaming and leave network selection on Automatic.
Top Vietnam eSIMs
Vietnam eSIM
Fixed
1 GB, 7 days€ 3.022 GB, 15 days€ 4.313 GB, 30 days€ 5.61Unlimited
Unlimited, 1 day€ 3.02Unlimited, 3 days€ 6.90Unlimited, 5 days€ 10.78
Compare current Vietnam eSIM plans, check the supported-device list and review the full Vietnam installation guide.
Check the Phone, Not Just the Model Family
eSIM support can vary by regional variant, carrier version and sales market. Open the phone’s SIM settings and look for Add eSIM, Add Mobile Plan or an equivalent option. Also confirm with the original carrier that the handset is unlocked.
Make Sure the Plan Includes Vietnam
A domestic profile from another country may roam in Vietnam only under its carrier’s terms. A regional travel plan may cover some Asian destinations but not all of them. Read the actual country list, validity and data allowance for the purchased product.
Prepare before the Flight
- Install the eSIM using private, stable Wi-Fi.
- Keep the primary SIM labelled separately from the Vietnam data line.
- Save the QR code and order details privately on another device.
- Download the first address and route for offline use.
- Follow the product’s stated activation timing.
Connect after Landing
Choose the Vietnam eSIM for Mobile Data, enable Data Roaming on that line and turn off automatic data switching. Allow Automatic network selection time to register. If manual APN entry is required for NoveSIM, use data.esim.
If service does not start, use aeroplane mode briefly and restart once. Do not delete the installed profile; preserve it while checking the remaining allowance, validity and current location.
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FAQ
Does every eSIM phone work in Vietnam?
No. The phone must be unlocked and the exact device variant must support eSIM, while the selected plan must include Vietnam.
Can I keep my normal SIM active?
Yes on a compatible Dual SIM phone, but check calls and texts separately and block primary-line mobile-data roaming.
Will a Vietnam eSIM give me a local number?
NoveSIM travel plans are data-only and do not include a Vietnamese telephone number.
Should I delete the eSIM if it has no service?
No. Check the data line, roaming, validity, network selection and APN, then contact Support before removing it.
Final Recommendation
Verify the exact handset and the exact plan before departure. Install on trusted Wi-Fi, keep offline arrival details and use the travel line for data with roaming enabled; this resolves the two separate questions behind whether an eSIM works in Vietnam.