Using a Galaxy S23 in Vietnam: eSIM Setup & Internet Guide
π»π³ Galaxy S23 works in Vietnam
- β Fully compatible with Viettel, Mobifone, Vinaphone (VNPT)
- β eSIM installs in 2 minutes β no SIM swap needed
- β US carrier models may be locked β confirm before traveling
- β Supports 2 active eSIMs β keep your home SIM active
Recommended eSIM Plans for Vietnam
See all plans βπ Global - 0.4883GB / 3 Days
Asialink
0.4883 GB Β· 3 days
π Global - 0.1953GB / 30 Days
Discover
0.1953 GB Β· 30 days
π Global - 1.0GB / 5 Days
Discover
1 GB Β· 5 days
π Global - 0.4883GB / 3 Days
Eurolink
0.4883 GB Β· 3 days
Prices shown for Free tier. Pro members save 7%, Premium save 12%.
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Galaxy S23 compatibility in Vietnam
Network band compatibility
Galaxy S23 supports LTE B1, B2, B3, B4, B5, B7, B8, B12, B13, B17, B20, B25, B26, B28, B38, B40, B41, B66. Snapdragon 8 Gen 2 modem. Strong global band coverage including B19 for Japan and B20 for Europe.
SIM configuration
Galaxy S23 supports nano-SIM + eSIM. US carrier variants may be locked β check before traveling or buy unlocked. Use Settings β Connections β SIM Manager to add an eSIM, not the regular Connections menu. Samsung's eSIM UI is different from stock Android.
Active eSIMs
2
Stored profiles
Up to 10
Physical SIM
Yes
Carrier lock risk
Check first
How to install your Vietnam eSIM on Galaxy S23
Complete these steps at home over Wi-Fi before your flight. Takes 2β3 minutes.
- 1
Open Settings β Connections β SIM Manager β Add eSIM
- 2
Select "Scan QR code from service provider"
- 3
Scan the QR code from your LTE.app order confirmation
- 4
Follow the on-screen prompts to complete installation
- 5
Set as your data SIM when you arrive at your destination
- 6
After landing in Vietnam, go to Settings and switch on your LTE.app eSIM line. Your phone connects to Viettel, Mobifone, Vinaphone (VNPT) automatically.
What happens when you land in Vietnam
- 1
Install your eSIM on Galaxy S23 before your trip
Scan the QR code from your LTE.app order at home over Wi-Fi. Takes 2β3 minutes. Your home SIM stays active and untouched throughout.
- 2
Land at Tan Son Nhat International Airport
After your flight, disable Airplane Mode. Open Settings β Connections β SIM Manager and enable your LTE.app eSIM line.
- 3
Connect to Viettel, Mobifone, Vinaphone (VNPT)
Your Galaxy S23 automatically connects to Vietnam's LTE network. Hanoi, Ho Chi Minh City, Da Nang, and Hoi An are well covered. Ha Long Bay (Halong) has LTE near the cruise port and on the main bay but may drop in coves. Sapa mountain area has improving coverage. Phu Quoc island is well covered in resort areas.
- 4
Maps, messaging, and apps work immediately
Navigation, translation, ride-hailing, and messaging apps all work the moment you exit the arrivals hall β no queuing, no SIM swap.
Roaming vs eSIM in Vietnam: cost comparison
Roaming your home carrier in Vietnam costs significantly more than a local eSIM.
US and EU carriers charge $10β20/day for Vietnam roaming. Vietnam has some of Asia's cheapest local data β roaming is exceptionally poor value.
Airport SIM kiosks at Tan Son Nhat and Noi Bai offer tourist SIMs for $2β8 for 10β30 GB. This is extraordinary value. An LTE.app Vietnam eSIM installs before landing and is similarly priced, with the advantage of zero airport queuing.
LTE coverage in Vietnam for Galaxy S23 users
Vietnam uses LTE bands 1, 3, 7, and 28. Viettel has the widest national coverage. Mobifone and Vinaphone (VNPT) compete in urban areas.
Hanoi, Ho Chi Minh City, Da Nang, and Hoi An are well covered. Ha Long Bay (Halong) has LTE near the cruise port and on the main bay but may drop in coves. Sapa mountain area has improving coverage. Phu Quoc island is well covered in resort areas.
Frequently asked questions β Galaxy S23 in Vietnam
Is the Galaxy S23 compatible with Vietnam's mobile network?
Yes. Galaxy S23 supports LTE B1, B2, B3, B4, B5, B7, B8, B12, B13, B17, B20, B25, B26, B28, B38, B40, B41, B66. Snapdragon 8 Gen 2 modem. Strong global band coverage including B19 for Japan and B20 for Europe. Vietnam uses LTE Vietnam uses LTE bands 1, 3, 7 β all supported by the Galaxy S23.
Can I keep my home SIM active while using a Vietnam eSIM on my Galaxy S23?
Yes. The Galaxy S23 supports 2 active eSIMs simultaneously. You can keep your home SIM active for calls and SMS while your LTE.app Vietnam eSIM handles data. Set Vietnam eSIM as your data SIM in Settings.
Is my Galaxy S23 carrier-locked? Will it work in Vietnam?
Galaxy S23 supports nano-SIM + eSIM. US carrier variants may be locked β check before traveling or buy unlocked. Use Settings β Connections β SIM Manager to add an eSIM, not the regular Connections menu. Samsung's eSIM UI is different from stock Android. To use an eSIM in Vietnam, your device must be unlocked. Contact your carrier or check Settings β if you can add an eSIM from another provider, it is unlocked.
When should I install the Vietnam eSIM on my Galaxy S23?
Install it at home over Wi-Fi before your flight. The process takes 2β3 minutes using the QR code from your LTE.app order. Vietnam requires the eSIM to be installed before arrival in some cases β never wait until you land. Tan Son Nhat International Airport has free Wi-Fi if you forget, but pre-install is strongly recommended.
How many eSIM profiles can I store on my Galaxy S23?
The Galaxy S23 can store up to 10 eSIM profiles, with 2 active at once. You can buy and install eSIMs for multiple countries in advance and switch between them without deleting old ones.
Other devices in Vietnam
More Vietnam resources
Ready to use a Galaxy S23 in Vietnam?
Install your eSIM before your flight. Works the moment you land at Tan Son Nhat International Airport.
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