Vinaphone vs Viettel vs Mobifone: Which Vietnam SIM Card Is Best for Indian Travelers?
✅ Last verified on-the-ground: 2026-07-18
You land at Tan Son Nhat or Noi Bai and a wall of SIM stalls hits you. Vinaphone, Viettel, Mobifone — the three Vietnam SIM card brands — all flashing tour signs in four languages. Your data is off, the line is 40 minutes long, and you need to pick one. This guide tells you which brand to buy, what to pay, and where to skip the airport markup.
Quick Answers
| What | Answer | Price (INR) |
|---|---|---|
| Cheapest tourist SIM (airport) | Viettel or Mobifone tourist pack, 14 days, ~6 GB | ₹450 (~130,000 VND or ~$4.67) |
| Best coverage (rural + mountains) | Viettel | ₹450 (~130,000 VND or ~$4.67) |
| Best urban 4G/5G in Hanoi + HCMC | Mobifone or Viettel (tied) | ₹450 (~130,000 VND or ~$4.67) |
| Best for SMS OTP (UPI/Indian bank codes) | Vinaphone or Mobifone | ₹450 (~130,000 VND or ~$4.67) |
| Skip the airport counter, buy in city? | Yes: same SIM is 30 to 50% cheaper | Save ~₹150 (~$1.56) to ~₹220 (~$2.28) |
Subodh’s Pro Tip: Don’t take the first SIM the airport tout waves at you. Walk 5 minutes past arrivals to the official branded counter (Viettel/Mobifone/Vinaphone have permanent kiosks, not just random stalls). The price is the same as the tout, the activation is faster, and the SIM is the real branded one, not a repackaged tourist pack with half the data.
Why These Three: The State-Owned SIM Oligopoly
Vietnam’s mobile market is a closed shop. Vinaphone, Viettel, and Mobifone together control close to 95% of subscribers, and the government has not issued a new mobile license in over a decade. A fourth operator, Vietnamobile, exists but coverage is patchy and tourist packs are rare. For an Indian traveler spending two to four weeks in Vietnam, the choice is effectively a three-horse race. If you’re planning a wider Southeast Asia trip, our Southeast Asia backpacking hub covers SIM strategy across the region.
All three sell near-identical tourist SIMs at the airport: around ₹479 (~130,000 VND or ~$4.97) for 14 days, with roughly 6 GB of high-speed data, some local minutes, and a domestic SMS allowance. The cards look different, the booths have different colors, but on paper, the product is almost the same. So the decision comes down to three things: which network has signal where you’re going, how the brand handles customer support when something goes wrong, and what the top-up process looks like when you run out of data on day nine in Da Lat.
Viettel: Best Coverage, Especially Outside the Cities
Viettel is the largest network in Vietnam by subscriber count and the only one run by the Ministry of Defence. It also has the strongest rural and mountainous coverage, which matters if your Vietnam route includes Sapa, Ha Giang, Phong Nha, or the central highlands. Travellers doing the Ha Giang loop or staying in homestays outside Sapa town report that Viettel is the only network with consistent 4G in those areas, Mobifone and Vinaphone drop to 2G or no signal on the same stretch.
In cities, Viettel is tied with Mobifone for 4G/5G speed. In Hanoi and Ho Chi Minh City, both networks average 40 to 80 Mbps on a 2026 phone. Vinaphone is a step behind in dense urban areas, where the network tends to congest in the late evening.
The downsides: Viettel tourist SIM activation at the airport can be slower than the other two because the staff run more document checks, and the brand’s English-language support hotline is hit-or-miss. Travellers also report that Viettel’s data throttling kicks in earlier on the cheaper plans, so your “6 GB” can feel like 4 GB by day ten if you’re heavy on video.
Mobifone: Best Balance for Most Indian Travelers
Mobifone is the middle option that ends up being the right choice for most Indian backpackers. Its coverage in cities and on the main tourist corridors (Hanoi to Hoi An, HCMC to Mui Ne, Da Nang to Hue) is excellent. Where Mobifone falls short is in the same places Vinaphone does: remote mountain regions and some border stretches. If your route is the standard first-timer loop (Hanoi, Ha Long, Ninh Binh, Hoi An, Da Nang, HCMC, Mekong), Mobifone is the lowest-friction option.
Two reasons Mobifone often wins for Indian travelers specifically. First, the brand’s tourist SIM is sold at the airport for the same ₹479 (~130,000 VND or ~$4.97) and same ~6 GB as Viettel, but the activation is faster and the staff at Tan Son Nhat in HCMC tend to speak better English. Second, Mobifone’s top-up is the easiest of the three: you can walk into any Circle K, Ministop, or FamilyMart, hand over cash, and have data reloaded in 60 seconds. Viettel and Vinaphone also accept top-up at convenience stores, but Mobifone’s retail footprint is slightly wider in tourist districts.
The main weakness is rural and mountain coverage. Travellers on the Ha Giang loop report Mobifone dropping to no signal on the Dong Van plateau stretch where Viettel still has 4G. If your route stays in the cities and the main corridors, this won’t matter.
Vinaphone: Cheapest Sometimes, but the Worst Tourist SIM Experience
Vinaphone is the third of the big three and the one I usually tell Indian travelers to skip unless there’s a specific reason. The network itself is fine in cities and on the north-south coastal highway, but Vinaphone’s tourist SIM offering is the weakest of the three: the airport pack often includes less high-speed data for the same ₹479 (~130,000 VND or ~$4.97), and the activation process at the kiosk is the slowest because the staff check your passport against a stricter blacklist of foreign-passport formats.
Where Vinaphone does have an edge is SMS delivery. If you’re using an Indian bank or UPI app that sends OTP via SMS while you’re abroad (most don’t, but some still do as a fallback), Vinaphone’s domestic SMS routing tends to be more reliable than Viettel’s, which occasionally delays foreign-originated OTPs. This is a narrow edge case. For 95% of Indian travelers, Mobifone or Viettel is the better call.
The other edge case: if you’re crossing into Cambodia overland at Moc Bai or Bavet, Vinaphone sometimes has cheaper cross-border roaming add-ons than the other two. If your trip is Vietnam plus Cambodia on the same SIM, ask the Vinaphone counter about the Cambodia add-on pack.
Airport vs City Store: Where to Buy
The airport is convenient, the airport is a rip-off compared to a city store on the same product. If you’re still deciding whether to go local SIM or roaming, our roaming vs local SIM comparison breaks down the math. A 14-day tourist SIM at Tan Son Nhat or Noi Bai is around ₹479 (~130,000 VND or ~$4.97), and the same SIM at a Mobifone or Viettel branded store in District 1 of HCMC or Hanoi’s Old Quarter is ₹258-₹331 (~70,000-90,000 VND or ~$2.67-$3.44). You save ₹110-₹221 (~30,000-60,000 VND or ~$1.15-$2.29) per SIM.
The catch: city stores want your passport for 10 to 15 minutes to register the SIM, and they often close by 8 or 9 PM. If you land at 11 PM, the airport is your only option and ₹479 (~130,000 VND or ~$4.97) it is. If you land during the day and your hotel is in a central district, skip the airport, drop your bags, and walk to the nearest branded store. The price difference pays for your first bowl of pho.
Safety Alert: Avoid the third-party “SIM helper” touts in the airport arrivals hall, the people who approach you before you reach the official counters. They sell the same SIM at the same price, but travellers report the SIMs sometimes come pre-registered to someone else, or with less data than promised, and the touts disappear before you can complain. Walk past them to the official branded booth.
eSIM: The Option Competitors Are Quietly Recommending
A growing number of Indian travelers arriving in Vietnam are skipping the physical SIM entirely and using an eSIM. The two big reasons: no airport counter, no passport registration, and you can be online before the plane’s doors open. You buy the eSIM on your phone before you fly, scan a QR code on landing, and you’re online in 60 seconds. Travellers report it works on the same Viettel and Mobifone towers as the physical SIM, so coverage is identical to a tourist-pack SIM you buy at the airport. For a full comparison, see our eSIM vs physical SIM breakdown.
The downside is price. A 14-day Vietnam eSIM with 6 GB runs around ₹771-₹1,157 (~8-12 USD), which is higher than the ₹479 (~130,000 VND or ~$4.97) airport price. The convenience premium is real. For a short three-day stopover in HCMC, an eSIM is the easy choice. For a three-week loop, the physical SIM is still cheaper by half. If you go the eSIM route, Get Nomad eSIM is a solid starting point and works on the same Viettel and Mobifone networks.
Topping Up: What Happens When You Run Out of Data on Day Nine
You will run out of data. Every Indian backpacker does, because the 6 GB tourist pack sounds like a lot and Vietnamese TikTok and Grab Eats are data hogs. All three brands sell data top-ups at any convenience store (Circle K, Ministop, FamilyMart, 7-Eleven when present), and the process is the same: walk in, say “nap dung lieu” (data top-up), point at the amount on the counter chart, hand over cash, get a text confirmation, done. No app, no login, no OTP.
For ₹184 (~50,000 VND or ~$1.91) you get roughly 3 to 4 GB of additional data valid for 30 days. For ₹368 (~100,000 VND or ~$3.82), around 8 GB. The exact split between high-speed and throttled data varies by brand and current promo, but the price is similar across all three. Mobifone and Vinaphone both also have a Viettel/Vinaphone/Mobifone app for topping up with a Vietnamese debit card, but if you don’t have one, the convenience store method is faster.
For a deeper look at topping up, including what to do if your SIM gets locked after a long break, the dedicated guide to topping up a Vietnam SIM covers the exact step-by-step.
UPI, OTP, and Indian Bank SMS in Vietnam
A common worry from Indian travelers: will my Indian bank OTPs and UPI verification SMS come through on a Vietnam SIM? The honest answer is: it depends. Most Indian banks now use app-based authentication, not SMS, so OTP over Vietnam network is rare. But some bank credit card fraud alerts and a few smaller NBFC OTPs still come by SMS, and those are routed as international SMS to a foreign number, which all three Vietnamese carriers support but with inconsistent delivery. For a deeper dive, see our SMS OTP guide for Indian travelers in Vietnam.
Travellers report Vinaphone is the most reliable for international SMS, Mobifone is middle, and Viettel is the slowest. If you specifically need reliable SMS for an Indian financial app while you’re in Vietnam, Vinaphone is the safer pick despite its other weaknesses. If you mainly need data for WhatsApp, Gmail, and Maps, this point is irrelevant and you should pick on coverage.
Daily Budget and the FX Math
Vietnam’s currency is the Vietnamese Dong (VND). At current rates, 1 INR ≈ 270 VND (cross-checked from the live FX rate on 2026-07-18). That means the ₹479 (~130,000 VND or ~$4.97) tourist SIM works out to roughly ₹480 (~$4.98), and the ₹258-₹331 (~70,000-90,000 VND or ~$2.67-$3.44) city-store price is ₹260 (~$2.70) to ₹330 (~$3.42). The airport-to-city saving on a single SIM is around ₹150 (~$1.56) to ₹220 (~$2.28), which is one street-food meal, not nothing.
For other on-the-ground costs that pair with a Vietnam SIM, a bowl of pho at a street stall is ₹92-₹147 (~25,000-40,000 VND or ~$0.96-$1.53), a draft beer at a backpacker bar is ₹55-₹92 (~15,000-25,000 VND or ~$0.57-$0.96), a Grab bike across District 1 is ₹74-₹129 (~20,000-35,000 VND or ~$0.76-$1.34). The SIM is one of the cheaper line items in a Vietnam daily budget but also the one that determines whether you can use Grab at all.
Which One Should You Pick: The Decision Tree
Pick Viettel if your route includes Sapa, Ha Giang, Phong Nha, the central highlands, or any stretch more than an hour off the main highways. Coverage in those areas is genuinely better and it’s the only network that holds 4G on most of the Ha Giang loop.
Pick Mobifone if your route is the standard backpacker loop: Hanoi, Ha Long, Ninh Binh, Hoi An, Da Nang, HCMC, Mekong Delta, with maybe Mui Ne or Da Lat. Mobifone has the smoothest top-up experience, the friendliest airport staff, and the fastest SIM activation.
Pick Vinaphone only if you specifically need reliable international SMS for Indian bank OTPs, or if you’re crossing into Cambodia and want the cheaper cross-border pack.
Pick eSIM instead of any of the three if you land late, you don’t want to spend 30 minutes at a kiosk, and you don’t mind paying ₹771-₹1,157 (~8-12 USD) for the convenience. The eSIM routes through the same Viettel and Mobifone towers, so coverage is identical to a physical SIM.
FAQ
Do Indian passport holders need to register the SIM at a police station? No. That rule was dropped years ago. The SIM registration is done at the airport counter or city store with your passport, and it’s valid for the full duration of the tourist pack (14 to 30 days depending on the plan).
Can I use my Vietnam SIM in Cambodia? Not by default. All three brands charge international roaming rates for Cambodia, which are steep. If you’re crossing to Cambodia, either buy a local SIM at the border (Siem Reap airport has good options) or ask at the Vietnam SIM counter for a cross-border add-on. Vinaphone’s is usually the cheapest.
What if my phone is locked to Jio or Airtel India? Most Indian-purchased phones, even JioPhones, are unlocked these days, but a few carrier-locked devices still exist. Test your phone with a friend’s SIM before you fly, or confirm with your Indian carrier that the device is unlocked for international SIMs. An eSIM phone (iPhone XS and newer, most 2020+ Androids) also works.
Is 6 GB enough for two weeks? For a typical Indian backpacker using WhatsApp, Google Maps, Grab, Instagram, and Gmail, yes. If you’re streaming Netflix or doing video calls daily, no, top up once around day 7 with another ₹184 (~50,000 VND or ~$1.91) pack at the nearest Circle K.
Can I keep the SIM number after I leave Vietnam? The tourist SIMs expire 14 to 30 days after activation and the number is recycled. If you need a stable number for OTPs or for family to reach you, use WhatsApp with your Indian number on roaming rather than relying on the Vietnam SIM for incoming calls.
Should I get the SIM at the airport or in the city? City store, by 30 to 50%, if you land during the day. Airport, if you land late or you want the SIM working before you leave the terminal. Same network, same coverage, different price.
Will UPI work on a Vietnam SIM? UPI works on data, not on SMS, so the SIM brand doesn’t matter for UPI. As long as you have data, UPI apps work the same as in India. The only catch: most Indian banks require a working Indian SIM for initial setup, so set up UPI before you leave India.
