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Vietnam travel guide for staying connected
SIM cards and eSIM, the three networks, Wi-Fi, the apps you need and city-by-city tips, checked against carrier and official sources.
Before you go
Các gói cước Viettel: What Travellers Need to Know About Vietnam's Biggest Network
Các gói cước Viettel is Vietnamese for "Viettel mobile plans" — the prepaid packages Vietnamese subscribers buy directly from Viettel, the country's largest network. As a visitor, you cannot easily buy one: they require a Vietnamese ID or a lengthy in-store registration, and the plan codes are sold in Vietnamese only. For a trip, the practical equivalent is a Vietnam eSIM, which runs on the same major networks and activates before you land.
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Gói cước 4G Viettel tháng: What Travellers and Locals Should Compare Before Buying
A Viettel monthly 4G plan (gói cước 4G Viettel tháng) is a prepaid package bought on a Vietnamese SIM, usually with a fixed data allowance and a 30-day cycle. Travellers who only need data for a trip of one to four weeks rarely need one: a Vietnam eSIM from VietSIM is cheaper to set up, activates on landing, and avoids the paperwork and queue at a Viettel store. If you are a Vietnamese subscriber comparing plans, use this page to see what to check; if you are visiting, buy the eSIM instead.
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Đăng ký 4G MobiFone: How to Register a MobiFone 4G Plan (and What Travellers Should Do Instead)
To register a MobiFone 4G plan you need a MobiFone SIM that is already active in your own name: dial the plan's USSD code (for example *090# for many data packages), confirm the SMS, or register in the My MobiFone app. If you are a visitor on a short trip, the simpler route is a Vietnam eSIM installed before you fly, which activates on landing with no shop visit and no passport registration.
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Gói cước 4G MobiFone: What Travellers Should Know Before Buying One
Gói cước 4G MobiFone are prepaid data packages sold to Vietnamese subscribers on MobiFone's network; they are not designed for short-stay visitors, and buying one usually means a Vietnamese phone number, ID registration and a top-up in dong. If you are arriving in Vietnam as a tourist, the simpler option is a Vietnam eSIM from VietSIM, installed before you fly and active the moment you land.
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Gói cước MobiFone: What the Plans Are, and What Travellers Should Buy Instead
A gói cước MobiFone is a prepaid package sold to MobiFone subscribers in Vietnam — a bundle of data, calls or SMS added to a Vietnamese SIM. It is not something a short-stay visitor can usefully buy: it requires a registered MobiFone number, and the packages are priced and renewed in Vietnamese dong. If you are travelling to Vietnam, the practical answer is a Vietnam eSIM bought before you fly, which activates on landing without a shop visit, a passport registration or a queue.
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Gói cước 4G MobiFone tháng: What Travellers Should Know Before Buying
MobiFone's monthly 4G packages (gói cước 4G MobiFone tháng) are postpaid-style bundles sold to Vietnamese subscribers, usually requiring a local ID or long-term registration at a MobiFone store. If you are visiting Vietnam for days or a few weeks, a prepaid Vietnam eSIM is the simpler route: you install it before you fly, it activates on landing, and you skip the queue and the paperwork entirely.
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MXH100: What This Vietnam Plan Code Means and What to Buy Instead
MXH100 is a Vietnamese mobile plan code — the kind of identifier that appears in the VietSIM plan catalogue (goi cuoc), where carrier plans are listed exactly as they are sold to Vietnamese subscribers. It is not a traveller product, and you cannot buy it as a visitor. If you are heading to Vietnam, the thing you actually want is a prepaid Vietnam eSIM, installed before you fly and active when you land.
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MXH120 Vietnam eSIM: What the Plan Code Means and What to Buy
MXH120 is a plan code used for a Vietnam eSIM — a prepaid data plan you install on your phone before you fly, so you land online without queueing at a SIM counter. If you searched the code, you are looking at plan-level detail rather than a destination guide. The practical move is to compare the live Vietnam eSIM plans in the store, match data and validity to your trip length, and buy the one that fits before departure.
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ST120K: What This Vietnam Mobile Plan Code Means
ST120K is a Vietnamese carrier plan code used in the local prepaid catalogue, not a product you buy from VietSIM and not something a visitor needs to order before a trip. If you searched ST120K because you are travelling to Vietnam, the practical answer is simpler: buy a Vietnam eSIM before you fly, install it at home, and activate it when you land. The plan codes in the catalogue exist for Vietnamese subscribers comparing domestic packages, and they are quoted exactly as the carrier sells them.
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UMAX50N: What This Vietnam Plan Code Actually Means for Travellers
UMAX50N is a carrier plan code used in Vietnam's mobile market — it identifies a specific prepaid package sold by one of the local networks, not a travel eSIM you can buy from abroad. If you found this code while comparing options for a trip, the practical answer is simple: you do not need to decode it. A Vietnam eSIM from VietSIM gives you data on landing without a shop visit, and the plan you want is the one matched to your trip length and data use.
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SD70: What It Means for Your Vietnam eSIM
SD70 is a carrier plan code used in Vietnam's mobile market — it is not a travel eSIM product you buy before a trip. If you are heading to Vietnam, you do not need to understand or order SD70: a VietSIM travel eSIM is a data plan tied to your phone's eSIM chip, activated on landing, with no carrier shop visit and no Vietnamese contract. Buy the Vietnam eSIM from the store, pick the data allowance that matches your trip length, and skip the plan-code research entirely.
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V90B: What This Viettel Plan Code Means for Travellers
V90B is a Viettel prepaid mobile plan code used in Vietnam's domestic market — a top-up package Vietnamese subscribers buy from the carrier, not a travel eSIM. If you are visiting Vietnam, you cannot buy V90B before you land, and it will not give you data on arrival. Travellers should buy a Vietnam eSIM instead, which installs before departure and activates when you connect in Vietnam.
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SD135: What the Code Means and How Travellers Get Online in Vietnam
SD135 is a carrier plan code used in Vietnamese mobile plan catalogues, not a travel document, visa class or eSIM product. If you are a traveller heading to Vietnam, you do not need to decode it: you need a prepaid Vietnam eSIM that installs before you fly and activates when you land. Buy the Vietnam eSIM from the VietSIM store, choose a data allowance that matches your trip length, and skip the airport SIM queue entirely.
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Big90 Vietnam: What the Plan Code Actually Means and What to Buy Instead
Big90 is a Vietnamese carrier plan code — a domestic top-up product sold to Vietnamese subscribers, not a travel eSIM. If you are a visitor to Vietnam, the code is not something you can buy at the airport or activate on arrival, and it will not give you data on a foreign SIM. Travellers should instead buy a Vietnam eSIM before departure, install it at home, and let it connect when the plane lands.
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How Much Data Do You Need for Vietnam? A Trip-Length Guide
Most travellers to Vietnam need roughly 1–2 GB per day for maps, messaging and light social media, and 3–5 GB per day if they post video, take calls or tether a laptop. That works out at about 7–15 GB for a week, 15–30 GB for two weeks, and 30–60 GB for a month. Pick a plan size from that range, then check the product record for the network, validity and activation terms before you buy.
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ST90K: What This Vietnam Mobile Plan Code Actually Means
ST90K is a Vietnamese carrier plan code sold to domestic subscribers, not a tourist product. Travellers cannot buy it at the airport or online, and it will not solve your data problem on landing. If you want working data in Vietnam from the moment you arrive, buy a Vietnam eSIM before you fly.
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Gói cước 4G Mobi: What Travellers Should Know About MobiFone Data Plans
Gói cước 4G Mobi is Vietnamese for a MobiFone 4G data package — a prepaid bundle that gives a Vietnamese SIM card a set data allowance for a set period. If you live in Vietnam and already hold a MobiFone SIM, you buy one by dialling the carrier's own USSD code or through the My MobiFone app. If you are visiting Vietnam, you almost certainly do not need one: a Vietnam eSIM from VietSIM installs before you fly, activates on landing and comes with a fixed data allowance you can see before you pay.
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