Prepaid
Top Pick: NomadPrepaid SIM Card & eSIM for Vietnam (2026 Guide)
A prepaid travel eSIM is a digital SIM card that installs on your phone via QR code. It provides mobile data in Vietnam without a physical SIM card, passport scan, or airport counter visit. Plans start from $1.37/GB.
- 7 Plans
- 2 Networks
- 5G
- Updated June 2026
Key Facts
- Cheapest eSIM
- $1.37/GB
- Network
- Vinaphone
- Speed
- 5G
- Plans available
- 7
- Main airport
- Tan Son Nhat (SGN) / Noi Bai (HAN)
- Airport SIM cost
- $5-15 for 6-20GB / 15-30 days
- ID required
- Yes — passport
As of June 2026, Vietnam has 7 prepaid eSIM plans across 2 networks at 5G speeds.
The cheapest rate is $1.37/GB via Nomad on Vinaphone.
Airport SIM counters at Tan Son Nhat (SGN) / Noi Bai (HAN) charge $5-15 for 6-20GB / 15-30 days for a comparable plan.
As of June 2026, a prepaid eSIM for Vietnam costs from $3.49 for 1GB with 5G speeds on Vinaphone and Viettel Mobile networks.
A prepaid eSIM for Vietnam starts at $3.49 for 1GB — priced in USD, charged to your home card before you fly. The SIM counter at Tan Son Nhat (SGN) / Noi Bai (HAN) prices plans in VND. Without local cash or a card that works at the kiosk, you walk away empty-handed after a 10-15 min wait. A prepaid eSIM eliminates the currency question entirely.
During Oct-Apr, Vietnam airports and phone shops face peak demand. Popular tourist SIM plans sell out first, and counter staff handle twice the normal volume. A prepaid eSIM bought a week before departure avoids the rush entirely — Vinaphone and Viettel Mobile connect the moment you land. Viettel launched 5G in Hanoi and HCMC in 2024; expanding to major cities Average download speeds in Vietnam reach 52 Mbps.
Local prepaid SIMs at city phone shops in Vietnam cost $3-8 for 4-10GB / 30 days. A prepaid eSIM at $27.49 for 20GB is a direct alternative — no shop visit, no wait. Whether you search for eSIM, e-SIM, or e SIM plans for Vietnam, the product is the same: a digital profile that installs on your phone without a physical card. VPN access is restricted in Vietnam. Install your VPN before you travel and test it over home WiFi to confirm it works with your provider. Traveling during Oct-Apr? Buy your eSIM at least a week before departure — airport SIM counters run longer queues and sometimes stock out during high season. Local currency in Vietnam is the VND (₫). Airport SIM counters often price plans in local currency — a prepaid eSIM is priced in USD with no conversion at point of purchase.
Compared
Our top prepaid eSIM choices for Vietnam
All providers route through local carriers in Vietnam. Sorted by overall rating.
We earn a commission on some links. It never changes our rankings or the price you pay.
| Provider | Rating | From / GB |
|---|---|---|
| 4.4 / 5 | from $3.00/GB | |
 AiraloBest Overall | 4.8 / 5 | from $4.50/GB |
| 4.5 / 5 | from $3.99/GB | |
 HolaflyBest Unlimited | 4.6 / 5 | from $2.99/day |
Prices verified June 2026. Updated monthly from provider websites.
Our pick for Vietnam: Nomad
For Vietnam in 2026, Nomad scores 4.4/5 with plans from $3.00/GB on Vinaphone's 5G network. Best per-GB pricing for budget travelers.
Comparison based on 4 providers tested in June 2026. Prices verified against official provider websites. See our methodology.
The Scenario
The arrival queue at Vietnam's main airport
Your client in Vietnam is waiting at the restaurant. Your flight was delayed 90 minutes. You land at Tan Son Nhat (SGN) / Noi Bai (HAN) and need to send a message immediately: "Running late, 30 minutes out." The SIM counter queue is 10-15 min. You cannot afford that wait. A prepaid eSIM installed before departure sends that message the moment you turn off airplane mode. PrepaidTraveleSIM at $3.49 for 1GB on Viettel — your client gets the update before your seatbelt is off.
Four Ways to Buy
Prepaid data options for Vietnam travelers
Compare airport counters, city shops, online delivery, and instant eSIM activation.
Airport SIM counter
10-30 min waitCosts around $5-15 for 6-20GB / 15-30 days at Tan Son Nhat (SGN) / Noi Bai (HAN). Budget 15-25 minutes for the queue. A prepaid eSIM installed at home costs less and skips the counter entirely.
City phone shop
ID requiredLocal SIMs cost $3-8 for 4-10GB / 30 days at city-center shops in Vietnam. Rates are better than the airport, but you need to make a trip and bring ID.
Online pre-order
Plan aheadSome providers ship physical SIMs to your hotel address. Order at least a week ahead. Free shipping is common. Bypasses the arrival-hall queue entirely.
Instant eSIM (our pick)
5 min setupBuy the night before your trip, scan the QR code at home over WiFi, and leave the SIM counter queue to everyone else. Nomad activates on landing — no ID, no counter, no wait.
Pricing
Per-day and per-GB cost for Vietnam data
SIM counters at Tan Son Nhat (SGN) / Noi Bai (HAN) charge $5-15 for 6-20GB / 15-30 days for a prepaid plan. A prepaid eSIM for Vietnam starts at $3.49 for 1GB — a savings of 30% — bought before your flight, delivered to your inbox, no counter visit.
The best per-GB rate is $1.37/GB on the 20GB plan at $27.49. Local prepaid SIMs at city phone shops run $3-8 for 4-10GB / 30 days — sometimes requiring a passport and an in-person stop. A prepaid eSIM at $27.49 for 20GB ($1.37/GB) installs remotely. Unlimited daily data starts at $4.25 for 1 day — $4.25/day (2GB at full speed per day).
| Data | Price (USD) | Price per GB |
|---|---|---|
| 1GB | $3.49 | $3.49 |
| 3GB | $7.49 | $2.50 |
| 5GB | $11.09 | $2.22 |
| 10GB | $19.31 | $1.93 |
| 20GBBest value | $27.49 | $1.37 |
| Unlimited / day | $4.43/day | — |
Vietnam mobile data prices are among the lowest globally — local prepaid costs 80% less than airport eSIM purchases.
Cost Breakdown
What a week of data costs in Vietnam
Remote workers in Vietnam need reliable data for video calls and file transfers, not just social media. The 5GB eSIM plan at $11.09 handles a week of light remote work. The 20GB plan at $27.49 fits a longer stay or heavier usage. Both cost less than the $5-15 for 6-20GB / 15-30 days the airport counter charges for a plan with no remote-work context at all.
| Trip | eSIM Plan | Airport SIM |
|---|---|---|
| 3 days | $3.49 (1GB) | $5-15 for 6-20GB / 15-30 days |
| 7 days | $11.09 (5GB) | $5-15 for 6-20GB / 15-30 days |
| 14 days | $27.49 (20GB) | $5-15 for 6-20GB / 15-30 days |
Roaming vs eSIM
Vietnam data costs: roaming plan vs eSIM
Why a prepaid eSIM beats carrier roaming in Vietnam
EE charges up to £3.50/day for non-EU roaming. Vodafone UK runs £6-8/day outside Europe. A week in Vietnam on these plans costs £24-£56 on top of your contract. A prepaid eSIM from Nomad at $3.49 for 1GB on Vinaphone covers that same week at a fixed rate. No daily cap, no fair-use throttle mid-trip, no surprise line item on next month's statement.
Coverage
4G and 5G coverage in Vietnam
Local residents in Vietnam use the same Vinaphone and Viettel Mobile networks that tourist SIMs run on. Buying a SIM in-country means walking into a phone shop, waiting, and registering a plan on the same carrier. A prepaid eSIM skips the in-store step entirely — same 5G network, no shop visit.
The best-value prepaid eSIM plan from Nomad is 20GB at $27.49 ($1.37/GB) — no airport visit, no queue, no passport copy required.
Available Networks
- RatingVinaphone5G
- Viettel Mobile5G
5G access in Vietnam
5G coverage in Vietnam is limited to select areas in the largest cities. Most of your trip will run on 4G/LTE, which handles maps, messaging, and video calls without issues. 5G access is a bonus when available, not a requirement. Viettel launched 5G in Hanoi and HCMC in 2024; expanding to major cities
Viettel provided solid 4G coverage across the Hai Van Pass route and in Sapa mountain area. Vinaphone dropped in remote Ha Giang.
Local Context
Vietnam prepaid SIM: what the fine print says
Average mobile download speeds in Vietnam reach 52 Mbps. That is fast enough for video calls, streaming, and maps. Here is the broader picture for travelers:
Wait times at Tan Son Nhat (SGN) / Noi Bai (HAN) SIM counters run 10-15 min. A prepaid eSIM activated before your flight skips this queue entirely. Buying a SIM in Vietnam: Passport required; real-name registration mandatory since 2018. A travel eSIM purchased before you depart bypasses these in-country requirements. VPNs not illegal but government blocks many VPN services; Facebook and Google generally accessible This restriction applies to all data connections in Vietnam, physical SIM or eSIM.
Quick Reference
Vietnam logistics: the short version
- Emergency
- 113/115
- Power Socket
- Type A/C
- Time Zone
- ICT (UTC+7)
- Currency
- VND (₫)
- eSIM Speed
- 5G
WiFi
Internet access options in Vietnam
Hotel WiFi in Vietnam slows between 8 PM and midnight when every guest streams, scrolls, and video-calls simultaneously. The router serving your floor shares bandwidth with dozens of rooms.
A prepaid eSIM on Viettel's 5G network does not share bandwidth with other hotel guests. Evening throughput stays consistent — plans start at $3.49 for 1GB.
Timing
Travel seasons and data demand in Vietnam
The best time to buy your Vietnam eSIM is 5-7 days before departure — early enough to troubleshoot any installation issues over home WiFi, late enough that the plan clock has not started before your flight. Some of the cheapest mobile data in the world; prices stable year-round
During Oct-Apr, buying earlier is even smarter. Airport SIM vendors at Tan Son Nhat (SGN) / Noi Bai (HAN) see peak demand and occasionally run out of popular tourist plans.
Data Tips
Vietnam trip data planning guide
Most travelers to Vietnam need 3-5 GB for a one-week trip. This covers maps, messaging, social media browsing, and occasional photo sharing. The smallest plan available starts at $3.49 for 1GB.
- 0.5 GBStory posterA few Instagram Stories per day in Vietnam. 0.5 GB on Viettel covers short video uploads and messaging. Save longer edits for WiFi. Prices are in USD — no VND conversion at purchase.
- 1 GBDaily posterDaily Instagram posts, TikTok scrolling, and Twitter updates in Vietnam. 1 GB on Viettel handles a week of moderate social media use. Vietnam runs on ICT (UTC+7) — jet-lagged travelers tend to use more data in the first 48 hours while adjusting.
- 3 GBActive creatorMultiple Reels or TikToks uploaded per day from Vietnam. 3 GB on Viettel supports a content creation schedule for a full week without WiFi hunting.
- 5+ GBFull-time creatorLive streams, video uploads, and constant social engagement from Vietnam. 5+ GB on Viettel handles the bandwidth of a full-time content schedule for two weeks.
Need internet without voice? See our data-only plan guide.
Device Check
Phone requirements for Vietnam eSIM
iPads with cellular support (WiFi + Cellular models) include eSIM hardware from the 2018 iPad Pro onward. Samsung Galaxy Tab S6 (2019) and newer also support eSIM. A tablet eSIM works the same as a phone eSIM in Vietnam — scan the QR code, toggle on data, and Viettel picks up the signal. Phone compatibility: iPhone XS (2018) and newer, Samsung Galaxy S20 (2020) and newer, Google Pixel 3 (2018) and newer. Viettel and Vinaphone both support eSIM connections in Vietnam. Viettel launched 5G in Hanoi and HCMC in 2024; expanding to major cities Verify carrier-unlock on all devices before buying. WiFi-only iPads and tablets cannot use eSIM at all.
Pre-Flight Checklist
Vietnam travel data: prepare before departure
Do this at home — not in the airport arrivals hall.
- 01
Confirm your phone model is compatible
Most phones made after 2018 support eSIM. iPhone XR and newer, Samsung Galaxy S20 and newer, and Google Pixel 3 and newer all work. If you are not sure which model you have, look on the back of the phone or check Settings → General → About on iPhone.
- 02
Ask your carrier to unlock your phone
Call the phone number on your monthly bill and ask: "Is my phone carrier-unlocked?" If it is not, request an unlock. This is free in most cases but can take a few days. An unlocked phone is required for the Vietnam eSIM to work.
- 03
Purchase a data plan before your trip
Plans start at $3.49 for 1GB. Go to the provider website, select Vietnam, and pick a plan. Pay with a credit or debit card. A QR code will arrive in your email inbox within a few minutes. Save that email — you will need it for the next step.
- 04
Scan the QR code while you are at home
Open your phone's camera and point it at the QR code on your screen or printed out. Your phone will ask to install the eSIM. Follow the on-screen steps — it takes about 2 minutes. After it installs, turn the new eSIM off in Settings. You will turn it back on when you arrive in Vietnam.
- 05
Turn on data when you land
After your plane lands in Vietnam, go to Settings → Cellular on iPhone and turn on the travel eSIM. Also turn on "Data Roaming" for that line. Within 2-3 minutes, you will see signal bars. Try opening a website to confirm everything works. If it does not connect, restart your phone and wait one more minute.
Step by Step
Getting data in Vietnam: two processes compared
Your flight lands at Tan Son Nhat (SGN) / Noi Bai (HAN) after 11 PM. The SIM counter closed at 10. Airport WiFi requires a local phone number to log in. Your hotel confirmation, your transfer details, and your offline map are all on apps that need data to refresh. Travelers without a prepaid eSIM spend the night relying on taxi drivers who may or may not understand the hotel name. A prepaid eSIM set up at home activates the moment you land — counter hours do not matter.
Airport SIM — 7 steps (~45 min)
- Land and collect bags
- Locate the SIM counter (not always signposted)
- Join the queue
- Show passport for registration
- Choose a plan from a rate card
- Pay (cash only at some counters)
- Wait for SIM activation
Prepaid eSIM — 3 steps (~5 min)
- Buy online before departure (2 min)
- Scan QR code over home WiFi (1 min)
- Enable on landing — connects automatically
Which Provider
Vietnam eSIM provider guide
The lowest per-GB rate we found for Vietnam is $1.37/GB — available through Nomad on a fixed data plan. That is the number to compare against the airport SIM counter price before you decide whether to buy ahead or gamble on arrival.
For travelers who want a single provider across all their trips, Airalo covers more destinations than any other option at a small per-GB premium. Holafly unlimited skips the math entirely. Saily is the right pick if public WiFi security in Vietnam is a concern.
Regional Plans
Cross-border eSIM options for Vietnam
Crossing from Vietnam into Thailand on a single-country eSIM triggers a new network registration. Some plans handle the switch automatically; others require manual APN adjustment or do not work outside the purchased country.
A regional eSIM bundle avoids this entirely. One plan, one QR code, continuous data across borders. Plans for Vietnam alone start at $3.49 for 1GB, and regional Southeast Asia bundles add multi-country coverage for a modest premium.
Related destinations: Thailand, Singapore, Indonesia, Myanmar
Compare providers side by side: Airalo vs Holafly · Airalo vs Nomad · Holafly vs Saily · Saily vs Nomad · All providers
The Honest Call
eSIM or local SIM: the Vietnam verdict
Choose an eSIM if you...
- Pay $1.37/GB instead of the airport counter rate of $5-15 for 6-20GB / 15-30 days for the same network
- Buy online at home with no airport markup or tourist-rate pricing
- Compare plans before you travel with no time pressure or jet lag
- Top up in-app at the same per-GB rate — no surprise charges
Choose a local SIM if you...
- City phone shops sell local prepaid SIMs at $3-8 for 4-10GB / 30 days — sometimes cheaper than eSIM for heavy data use
- Long stay of a month or more where a local monthly plan is more cost-effective
- You found a local carrier promotion that undercuts standard eSIM per-GB pricing
- Phone is not eSIM-capable so a physical SIM is the only option
Compare alternatives: pocket WiFi vs eSIM | prepaid vs postpaid
Avoid These
How not to buy data in Vietnam
Buying at the airport on impulse.
Counter SIMs cost 2-5x a prepaid eSIM you could have set up at home. Decide before you fly.
Over-buying data.
Most travelers use under a gigabyte a day. Start with the smallest plan and top up in-app rather than paying for unused gigabytes.
Forgetting offline maps.
Download each city in Google Maps before you go. It saves data and works when signal dips.
Assuming convenience-store SIMs are easy.
They exist in Vietnam, but stock is thin and staff rarely help with setup. A prepaid eSIM is far simpler.
Privacy
Vietnam VPN rules and travel security
Vietnam restricts VPN usage. VPNs not illegal but government blocks many VPN services; Facebook and Google generally accessible Download your VPN app before arrival — installation may be blocked once you connect to a local network. Configure obfuscation or stealth mode if your VPN supports it.
Saily pairs eSIM data with NordVPN in a single account, which simplifies the setup for privacy-conscious travelers. A prepaid eSIM on 5G gives your VPN the stable cellular backbone it needs to stay connected.
Learn more: eSIM security and privacy guide
Troubleshooting
Fixing mobile data problems in Vietnam
Timer started before I arrived
Some plans count days from first connection, not from the time you install them. Set the Vietnam eSIM to off immediately after installation and only enable it after landing at Tan Son Nhat (SGN) / Noi Bai (HAN). A layover connection can burn a full day of your plan.
Dual-SIM setup confusion
Set your Vietnam eSIM as the cellular data line and leave your home SIM active for calls only. Both SIMs run simultaneously. Go to Settings → Cellular → Cellular Data and select the travel eSIM. Your home number stays reachable on Viettel's network.
Selected incorrect plan at checkout
Act before activating. Most eSIM providers offer a cancellation window of up to one hour on unused plans. Do not toggle the eSIM on — open the provider app, find your Vietnam order, and contact support to cancel before any data is consumed.
Running low on data mid-trip
Check Settings → Cellular for a per-app data breakdown. Background app refresh is usually the culprit in Vietnam — data consumption spikes when apps refresh silently over Viettel. Disable it globally before landing and download offline maps over hotel WiFi.
The Bottom Line
Final take on prepaid data for Vietnam
Viettel's 5G network covers Vietnam's major cities and tourist areas, and Nomad routes your prepaid eSIM through it. You get the same coverage a counter SIM would give you — bought from home before your flight, at a fraction of the airport price. At $1.37/GB, it activates the moment you land. Skip the physical SIM unless you need a local number for calls. Note: VPN access is restricted in Vietnam — install your VPN app before arrival. If traveling during Oct-Apr, buy early — airport counters run out and online plans sell faster.
Starting at $1.37/GB, a prepaid plan for Vietnam is one of the easiest upgrades for any trip. See the full destinations list or explore more Southeast Asia destinations, or read how to activate your eSIM before you fly.
Viettel has the widest coverage in Vietnam, reaching remote northern mountains where Vinaphone and Mobifone have gaps.
How we test and score: editorial policy · corrections log
FAQ
Vietnam data questions and answers
Can I buy a SIM card at Tan Son Nhat (SGN) / Noi Bai (HAN) airport?
Tan Son Nhat (SGN) / Noi Bai (HAN) has SIM counters, but the cost is higher than buying a prepaid eSIM before you leave home. Airport SIMs from Viettel and Vinaphone and Mobifone cost around $5-15 for 6-20GB / 15-30 days. Queue wait times average 10-15 min. You also spend time at the counter after a long flight — 15-25 minutes on average. A prepaid eSIM for Vietnam costs $3.49 for 1GB and installs in 5 minutes from your couch. You land with data already active.
Do I need a passport to buy a SIM in Vietnam?
Yes — Passport required; real-name registration mandatory since 2018 Foreign passports sometimes cause delays or outright rejection at local counters. A prepaid eSIM eliminates the ID requirement entirely: buy online before your flight, scan the QR code at home, and your phone connects to Viettel's 5G network the moment you land in Vietnam. No counter visit, no registration form, no waiting.
Is an airport SIM or eSIM cheaper for Vietnam?
The eSIM is cheaper. Airport SIMs at Tan Son Nhat (SGN) / Noi Bai (HAN) cost $5-15 for 6-20GB / 15-30 days (plus 10-15 min waiting at the counter). A prepaid eSIM for Vietnam starts at $3.49 for 1GB, with the best per-GB value at 20GB for $27.49 ($1.37/GB). Beyond price, the eSIM delivers faster connectivity — you activate on the plane and skip the arrivals queue entirely. Airport SIM counters also close at night, leaving late-arrival travelers without options.
Can I install my Vietnam eSIM before I travel?
Yes — and the best approach is to install it before you board, then keep it inactive until you land. Scan the QR code at home over WiFi, set the Vietnam eSIM to off, and leave your home SIM running normally. When the plane touches down, toggle the eSIM on. It connects to the local network within a few minutes — usually before you reach baggage claim. No airport WiFi needed, no kiosk stop. Plans start at $3.49.
Which phones support eSIM for Vietnam?
All iPhone models from the XS (2018) onward support eSIM — that covers iPhone XS, XR, 11, 12, 13, 14, 15, and 16 series. The iPhone 14 US edition removed the physical SIM tray entirely, making eSIM the only option. Samsung Galaxy S20 (2020) and newer also support eSIM, as does the Galaxy A54 and later A-series models. Google Pixel 3 (2018) and newer round out the major brands. Before purchasing, confirm your phone is carrier-unlocked: Settings > General > About on iPhone, or Settings > Connections > SIM Manager on Android.
Can I use my prepaid eSIM as a hotspot in Vietnam?
Yes. Connect your laptop to your Vietnam eSIM via hotspot: on iPhone, toggle Personal Hotspot in Settings; on Android, go to Settings > Hotspot & Tethering. Your laptop sees the phone as a WiFi network. Speed depends on Vietnam's cellular infrastructure — average download speeds run 52 Mbps, enough for most work tasks. Buy a plan 50% larger than your phone-only estimate if you expect regular laptop tethering. Disable auto-updates and cloud backup on the laptop to preserve data.
What happens when my prepaid eSIM data runs out in Vietnam?
Data stops without overages or automatic charges. Prepare for this before your trip: download offline Google Maps for Vietnam, save key addresses in your notes app, and screenshot your hotel confirmation. These work with zero data. When you need to top up, find WiFi at any hotel or cafe in Vietnam, open your provider's app, and buy more data in about 2 minutes. The eSIM profile stays on your phone — no reinstall required.
Can I keep my home phone number while using a Vietnam eSIM?
Yes. On Android, go to Settings > Connections > SIM Manager after installing your Vietnam eSIM. Set the travel eSIM as "Mobile Data" and your home SIM as "Calls" and "SMS." This routes all internet traffic through the travel plan while keeping your home number active for incoming calls. WhatsApp and Telegram stay linked to your home number and use the eSIM data line. Both profiles run at the same time — no manual switching needed during your Vietnam trip.
How far in advance should I buy my Vietnam prepaid eSIM?
One to two days works for single-destination trips. Multi-stop itineraries need more lead time: buy all your eSIMs at home before departure. A Vietnam eSIM plus plans for your other stops can all be installed simultaneously — iPhones hold 8 profiles, Samsung devices hold at least 2. Toggle each country's plan on when you land there. Validity starts from first use per country, so pre-purchasing all plans costs nothing extra. Plans for Vietnam start at $3.49.
Does eSIM work without WiFi after installation in Vietnam?
Yes — your eSIM connects to Vietnam's cellular network independently of WiFi. If you are lost or stranded with no WiFi access, the eSIM still provides data for maps, messaging, and emergency contacts. The cellular connection runs through Viettel's towers, which cover most populated areas of Vietnam. WiFi is only needed once: during the initial QR code scan at home. After that, the eSIM operates entirely on the local mobile network.
Can I have two eSIMs on my phone at the same time for Vietnam?
Samsung Galaxy S21+ and newer support dual eSIM — two eSIM profiles stored and active at the same time. Go to Settings > Connections > SIM Manager to install your Vietnam travel eSIM alongside your home plan. The phone handles both profiles without conflict. Older Samsung models (S20, Note 20) support one eSIM plus one physical SIM. Z Fold and Z Flip series from 2021 onward also support dual eSIM. Switch the active data line in SIM Manager.
How do I check if my phone is unlocked for eSIM in Vietnam?
A locked phone rejects every travel eSIM, including all plans for Vietnam. Check before you buy: on iPhone, go to Settings > General > About and look for "No SIM restrictions." On Samsung, open Settings > Connections > SIM Manager — if the "Add eSIM" option is grayed out, your phone may be locked. Call your carrier to confirm. Unlocking is free in most countries after your contract period ends, but the request takes 24-72 hours to process.
Buy your Vietnam eSIM now
Nomad: from $1.37/GB on Vinaphone. Activates the moment you land.