Vietnam is outside EU roam-like-at-home arrangements, so visitors should not assume their domestic allowance applies.
Costs depend on the home carrier, contract and any travel pass activated before or after arrival.
NoveSIM travel eSIMs are data-only and do not include conventional calls or SMS.
Quick answer: Check the written Vietnam tariff for data, calls and voicemail before enabling roaming. If the price is unclear, disable roaming on the home SIM and use a defined travel eSIM or registered local SIM.
Top Vietnam eSIMs
Vietnam eSIM
Fixed
1 GB, 7 days€ 3.052 GB, 15 days€ 4.363 GB, 30 days€ 5.67Unlimited
Unlimited, 1 day€ 3.05Unlimited, 3 days€ 6.98Unlimited, 5 days€ 10.91
Check more than the daily fee
Confirm the allowance, renewal time, overage rate and whether incoming calls or voicemail trigger charges. Take a screenshot of the terms.
Compare alternatives
Review a Vietnam eSIM, the Vietnam SIM guide and mobile internet options.
Prevent home-line data use
Disable roaming and mobile-data switching for the home SIM. Use Vietnam eSIM settings for iPhone where relevant.
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FAQ
Is roaming free in Vietnam?
Only if your specific carrier plan explicitly includes it.
Can a travel pass renew daily?
Some do; check the operator’s billing period.
Can I keep my home SIM active?
Yes, while controlling its data, calls and voicemail charges.
Does an eSIM prevent all roaming fees?
Only if the home line is configured not to incur chargeable use.
Final Recommendation
Verify Vietnam roaming terms before departure.
Use a defined alternative when the price or allowance is unclear.
Disable automatic fallback to the home line and monitor both SIMs.