eSIM for Hong Kong

Viasimo's Hong Kong eSIM starts at $1.29 for 500 MB over 7 days, running on csl and SmarTone with 5G where available. Plans last 1 to 180 days, arrive by email in minutes and install from your phone's settings, with no app.

Works everywhere in Hong Kong

Central and Western
Eastern District
Islands
Kowloon City
Kwai Tsing District
Kwun Tong District
North District

Select your planIn stock

Duration

Quantity

Unlimited data · 3 Days$8.00

Unlimited data · 3 Days ×1

$8.00

Going to more than one country? See regional plans

Does my phone take an eSIM? Check now

Dial *#06# on your phone. If you see an EID number, your phone takes an eSIM. Most phones sold since 2019 do.

Not sure it works on your phone? Check compatibility

Network

Which networks does the Hong Kong eSIM use?

Host networks: csl / SmarTone

Your eSIM picks one automatically; you do not choose or switch between them.

Data: 100 MB – 50 GB or unlimited
Validity: 1–180 days
Speed: 4G LTE / 5G
Hotspot / tethering: Supported on most devices
Activation: Automatic on arrival
Speed management: Roughly 2-3 GB per day at full speed, sometimes less depending on the local carrier, then reduced
Top-ups: Add more data from your account, before the plan expires
Text messages (SMS): Data only: use an app for verification codes
Connects via: Singapore
Unused validity: 180 days before it must be installed

Setting up Buy, scan the QR code we email you, and switch on the travel line when you land. How it works

Choosing a plan

How much data do you need?

The allowances below are our sizing recommendations, not measurements. The plan beside each one is the cheapest option on this page that covers it.

Recommended data allowances matched to the plans sold for this destination
You are	Plan for	Cheapest plan that covers it
LightMaps, messaging and the occasional lookup	About 1 GB a week	$1.791 GB, 7 days
TypicalMaps, social, photos and some browsing	About 3 to 7 GB a week	$5.005 GB, 30 days
HeavyVideo streaming, video calls and uploads	10 GB a week or more	$9.0010 GB, 30 days
Working or sharingTethering a laptop, calls and cloud sync	20 GB a week or more	$14.9920 GB, 30 days

Work it out from your own habits

What a week abroad costs

eSIM, local SIM or roaming?

Charged per day

Your carrier roaming

Queue and plastic

A SIM at the airport

$1.29

Viasimo, one bundle

Only the Viasimo figure is a price: it comes from today’s live catalog. The other two rows are directional, not quoted rates.

About this eSIM

Hong Kong is one of the easiest places in the world to have a phone. It is small, vertical, extremely densely built and wired to match, with service that follows you down into the MTR tunnels and up the escalators through Central. The catch is not coverage, it is geography: a Hong Kong plan covers Hong Kong, and the moment you cross into mainland China or over to Macau you are somewhere else entirely as far as your data is concerned.

Getting online when you land

Install the profile before you fly, while you are on wifi you control. The airport on Chek Lap Kok moves people fast, and the Airport Express will have you in Kowloon or Central quickly, so the useful moment to be online is when you step off the plane, not twenty minutes into a hunt for a hotspot.

Switch the travel line on at the gate, let it attach while you walk to immigration, and confirm that data roaming is enabled for that line on its own. That single per-line setting accounts for most of the phones that show a full signal and load nothing.

Keep your home number live for verification codes; you will need them if you are adding a payment card to your wallet or logging into anything while you are here. Label the two lines clearly so you do not accidentally leave your home data on while walking around.

The networks you'll be on

You will be on csl or SmarTone. Both run 4G LTE and 5G, so whether you see a 5G icon depends on where you are standing rather than on anything you can control.

Practically, it makes little difference to a traveller. Hong Kong's 4G is dense and fast enough that maps, video calls, transit apps and photo uploads all feel instant. If you specifically want 5G and are not getting it, that is a coverage outcome, not a fault, and it is not worth chasing.

Unlike the mainland, the services you already use work normally here, so your usual maps, messaging and search apps behave exactly as they do at home.

Where coverage holds, and where it thins

Almost everywhere holds. Hong Kong Island from Kennedy Town through Central, Admiralty, Wan Chai and Causeway Bay, all of Kowloon from Tsim Sha Tsui up through Mong Kok and Sham Shui Po, and the New Territories new towns like Sha Tin, Tuen Mun and Tai Po are uniformly well served. The MTR has coverage in the tunnels and on the platforms, which is why nobody in a carriage here is looking at anything other than a screen.

The thin spots are specific and predictable. The country parks are the main one: the ridge trails have signal because they look down on the city, but drop into a wooded valley on the MacLehose or into the reservoir catchments behind Sai Kung and it goes. Tai Long Wan and the remoter Sai Kung beaches are genuinely quiet.

Ferries lose signal mid-harbour crossing and further out on the runs to Cheung Chau and Lamma, though both islands are fine once you are ashore. Lantau is mixed: Tung Chung and Ngong Ping are covered, the trails over Sunset Peak and Lantau Peak are not, and Tai O on the western shore is quieter than the rest.

The important gap is jurisdictional. A Hong Kong plan does not extend to the mainland or Macau. If you are crossing at Lo Wu or Lok Ma Chau to Shenzhen, taking the high-speed rail north from West Kowloon or heading to Macau by ferry or bridge, sort out separate coverage for that leg rather than assuming your phone will follow you.

What you'll actually use data for here

Transit, constantly. Working out which MTR exit to use, which of the five is nearest your restaurant, and whether to take the Star Ferry or the tunnel bus is the single most common thing your phone does here. Real-time bus and ferry information, minibus routes and the walkway network through the elevated podiums are all things you will look up rather than intuit.

Food is the next one. Restaurant discovery here happens online, queues get managed by ticketing apps, and opening hours for the places worth visiting are narrow and change.

Then weather, which in Hong Kong is not small talk. Typhoon signals and rainstorm warnings shut the city down in a structured, well-signposted way, and knowing which signal is hoisted tells you whether the ferries are running and whether the office district is open. In summer you will check it daily.

Payments matter too: the Octopus card has an app, and a lot of small transactions run through phones rather than cash.

Before you fly

Confirm your handset supports eSIM and is unlocked, and install the profile at home. Download an offline map anyway, mostly for the hiking trails rather than the city.

Screenshot your hotel address in Chinese characters, which makes a taxi trip far easier than reading it out in English. Save your booking references and flight details.

Bring a power bank, because a day here is a lot of walking, screens and photos, and pack a plug adapter for the British-style three-pin sockets. Get an Octopus card sorted early, whether physical or in your wallet, since it covers transport and most convenience shops. Finally, if your trip includes the mainland, plan that connection before you cross the border, not after.

Unlimited runs at full speed up to a fair-use limit, then continues slower.

Before you buy

Important to know

This is a data-only eSIM. It carries no calls or SMS on its own number.
Your existing number stays on your primary SIM, so calls and verification texts keep working.
Your phone must support eSIM, and some carrier-locked phones cannot install one.
Signal varies with location, terrain, congestion and your handset. Dense urban areas are consistently better served than remote ones.
5G only works where the host network has deployed it and your phone supports it. Everywhere else it falls back to 4G LTE.
The eSIM selects a host network automatically. You cannot pick or switch between them.
Unlimited plans run at full speed up to a fair-use limit, then continue at a reduced speed. Read the fair usage policy

Looking for more information?

Frequently asked questions

Does an eSIM work in Hong Kong?

Yes. Your Hong Kong eSIM connects automatically the moment you arrive, with no roaming fees and nothing to set up at the airport. The host networks it can use are csl, SmarTone. Coverage runs on 4G LTE and 5G where the network has rolled it out, and falls back to 4G elsewhere.

Do I get 5G in Hong Kong?

Yes, where it has been deployed. 5G runs on csl, SmarTone in Hong Kong, and your eSIM uses it automatically on a 5G-capable phone, dropping back to 4G LTE outside covered areas. No country is covered everywhere, so 5G availability varies by location.

Can I check my bags in before going to Hong Kong airport?

Yes, for many airlines. In-town check-in at the Airport Express Hong Kong and Kowloon stations lets passengers on Cathay Pacific, Hong Kong Airlines, Qantas and others get boarding passes and drop luggage. Some airlines, such as Singapore Airlines and China Airlines, only offer this at Hong Kong station. The train to the airport takes about 24 minutes from Central.

Which taxi do I take from Hong Kong airport to Tai O or Ngong Ping?

Take a blue Lantau taxi. Hong Kong's roughly 75 blue taxis serve Lantau Island and the airport. Red urban taxis can reach north Lantau, but blue ones are the right choice for southern and western Lantau. Green taxis serve the New Territories. None of the three can drive into most of Discovery Bay.

Can Hong Kong authorities ask to look at my phone?

Potentially, yes. The UK Foreign Office says Hong Kong's national security laws require people to cooperate with national security investigations, which can include giving full access to electronic devices. The laws apply to all visitors, and people have been prosecuted for online statements critical of the authorities. Think about what you carry and post.

Is there wifi and charging on the Airport Express?

Yes. Wifi is available on every Airport Express car, and the first and seventh cars have USB ports and power points. With an eSIM already active you won't need the train wifi, but the charging points are handy after a long flight. Trains run about every 10 minutes during the day.

How much data do I need for 7 days in Hong Kong?

For 7 days in Hong Kong, Viasimo sells 100 MB for $1.29, 500 MB for $1.29, 1 GB for $1.79, and unlimited data for $17.00. Our sizing recommendation, not a measurement: maps, messaging and the occasional lookup, about 1 GB a week; maps, social, photos and some browsing, about 3 to 7 GB a week. The data calculator on this site works it out from how you actually use your phone.

Installing, keeping your number, topping up and hotspot work the same everywhere: see how it works →

Know before you go

Hong Kong: what to know before you land

In Hong Kong your eSIM connects to csl or SmarTone, two of the city's main 5G networks. A few local details are worth knowing before you go: you can check your bags in for many flights at the Airport Express stations, taxis are colour-coded by the area they're allowed to serve, and Hong Kong's national security laws can require access to electronic devices.

Emergency: 999
Plugs: G 220V
Currency: Hong Kong dollar (HKD)

Main airports

HKG Hong Kong International Airport

Apps worth having MTR MobileOctopusMyObservatoryCitymapperWhatsApp

Airport Express and in-town check-in at Hong Kong and Kowloon stations

The Airport Express links Hong Kong International Airport (HKG) on Chek Lap Kok with Hong Kong station in Central in about 24 minutes, stopping at Tsing Yi and Kowloon. Trains run roughly every 10 minutes during the day and every 12 minutes late at night. Every carriage has wifi, and the first and seventh cars have USB ports and power sockets, which helps if your battery is low after a long-haul flight.

The most useful extra is in-town check-in. If you're flying with Cathay Pacific, Hong Kong Airlines, Qantas and several other airlines, you can check in and drop your bags at Hong Kong or Kowloon station, then spend your last day in the city without luggage. Some airlines, including Singapore Airlines and China Airlines, only offer this at Hong Kong station. Check your airline's cut-off time in its app before you leave the hotel.

The free Airport Express shuttle buses to hotels stopped in 2020. Since July 2024, a limited number of hotels have run their own shuttles from the old bus bays at Hong Kong and Kowloon stations, so ask your hotel whether it's one of them.

Red, green and blue taxis from Chek Lap Kok

Hong Kong's taxis are colour-coded by the area they're licensed to serve. Pick the wrong queue at the airport and the driver may not be allowed to take you.

Red urban taxis cover Hong Kong Island, Kowloon and the New Territories, and can also run to north Lantau, the airport and the Hong Kong–Zhuhai–Macau Bridge port. They're the most expensive.
Green New Territories taxis serve much of the New Territories, including Tuen Mun, Yuen Long, Tai Po and parts of Sai Kung and Sha Tin, plus the Lok Ma Chau and Shenzhen Bay border crossings.
Blue Lantau taxis, only about 75 of them, run mainly on Lantau and at the airport. They're the ones to take to Tung Chung, Ngong Ping or Tai O.

None of the three may drive into most of Discovery Bay, which relies on its own buses and ferries.

Ride-hailing apps are also used in Hong Kong. Their fares aren't controlled like metered taxis, and the government has said it's working on rules for online ride-hailing. Whichever you use, having mobile data lets you share your pick-up pin and follow the route.

Hong Kong's national security laws and your phone

The UK Foreign Office explains that Hong Kong's 2020 National Security Law and the 2024 Safeguarding National Security Ordinance cover offences such as secession, subversion, treason and sedition. Some carry life imprisonment, and the laws can be interpreted broadly. They apply to everyone, whatever their nationality, and also to actions taken outside Hong Kong.

Two points matter for travellers with phones and laptops:

People and organisations are required to cooperate with national security investigations, and the Foreign Office notes this can include giving full access to electronic devices.
Some people have been prosecuted for online posts or other statements critical of the Hong Kong or Chinese authorities.

Think about what's on your devices and what you post while you're there. Some travellers bring a phone with less personal data on it. Protests are rare now, but if you come across one, move away and follow police instructions. The Foreign Office also advises against photographing military installations. Typhoon season runs from May to November, and public transport and public offices close under a Typhoon Signal 8.

Researched October 2026 · 5 sources

gov.uk Hong Kong travel advice: safety and security – GOV.UK
en.wikipedia.org Airport Express (MTR) – Wikipedia
en.wikipedia.org Taxicabs of Hong Kong – Wikipedia
en.wikipedia.org Telecommunications in Hong Kong – Wikipedia
worldstandards.eu Plug, socket & voltage by country – WorldStandards

7-day itinerary

Seven days in Hong Kong: Central, Kowloon, Lantau, Sai Kung and the outlying islands

A week that mixes the city with Hong Kong's surprisingly wild side: Central and the Peak, Kowloon's harbourfront and markets, the Big Buddha and Tai O on Lantau, the Dragon's Back ridge, the volcanic coast of Sai Kung and a Lamma Island walk.

Length: 7 days

When to go October to December brings clear, dry weather that suits hiking; March to May is warm and often hazy, and June to September is hot, humid and typhoon season, when Signal 8 can shut ferries and cable cars.

Day 1 Hong Kong Island

Central and Victoria Peak

Airport Express to Hong Kong station takes about 24 minutes.

Take the Airport Express to Hong Kong station and, if your airline allows, use in-town check-in on your last day. Walk through Central to the Tai Kwun heritage and arts centre in the old police station compound, then ride the Central–Mid-Levels escalators uphill. Late in the afternoon take the Peak Tram up to Victoria Peak and walk the level Lugard Road loop for views of the harbour as the lights come on.

Signal Your eSIM connects to csl or SmarTone, both with dense 5G across Central. The Airport Express has wifi, but you will not need it.
Day 2 Hong Kong Island

Star Ferry and Kowloon

The Star Ferry from Central Pier takes under 10 minutes; the MTR links all of today's stops.

Cross the harbour on the Star Ferry to Tsim Sha Tsui and walk the waterfront promenade past the Clock Tower and the Avenue of Stars. Head to the West Kowloon Cultural District for M+, the museum of visual culture, and the Hong Kong Palace Museum. In the evening go north to Yau Ma Tei for the Tin Hau Temple and the Temple Street night market, or watch the harbour light show from the promenade.

Signal Strong 5G on both sides of the harbour, including in MTR stations and on trains. Crowds at the night market can slow data briefly.
Day 3 Hong Kong Island

Lantau: Big Buddha and Tai O

About 40 minutes by MTR from Central to Tung Chung, then 25 minutes by cable car; buses link Ngong Ping, Tai O and Tung Chung.

Take the MTR to Tung Chung and ride the Ngong Ping 360 cable car over the hills to Ngong Ping. Climb the steps to the Tian Tan Buddha and visit Po Lin Monastery, then walk the short Wisdom Path. Continue by bus to Tai O, a fishing village of stilt houses over tidal creeks, where boats run short trips along the shore. Return by bus to Tung Chung.

Signal Good coverage at Ngong Ping and Tai O, but it dips on Lantau's hill roads. On the western tip near Tai O, check your phone hasn't switched to a mainland or Macao network.
Day 4 Hong Kong Island

Dragon's Back, Shek O and Stanley

Buses run from Shau Kei Wan MTR station to the trailhead in about 20 minutes; the ridge walk takes 2–3 hours.

Take the MTR to Shau Kei Wan and the bus to To Tei Wan to start the Dragon's Back trail, a ridge walk with views over Shek O and the South China Sea. Descend to Big Wave Bay for a swim, then go to Shek O village. In the afternoon take a bus to Stanley for its waterfront, market and Murray House, a colonial building moved stone by stone from Central.

Signal Coverage is good on most of the ridge, which is open and high. Start early in hot months and carry water: there is no shop on the trail.
Day 5 Hong Kong Island

Sai Kung and the Geopark

About 1 hour from Central by MTR to Diamond Hill or Choi Hung, then bus or minibus to Sai Kung. East Dam is about 30 minutes from Sai Kung by taxi.

Head to Sai Kung town on the eastern side of the New Territories. Visit the Volcano Discovery Centre on the waterfront, then take a taxi to the East Dam of High Island Reservoir, part of the Hong Kong UNESCO Global Geopark, where columns of volcanic rock rise above the sea. Back in Sai Kung, catch a small ferry from the pier to Sharp Island for a swim before returning to the city.

Signal Strong signal in Sai Kung town, but patchy at East Dam and on the remote coastal paths. Arrange your return taxi before you lose signal.
Day 6 Hong Kong Island

Lamma Island

About 30 minutes by ferry from Central Pier 4.

Take the ferry from Central to Yung Shue Wan on Lamma, a car-free island. Walk the Family Trail across the island past Hung Shing Yeh beach and the lookout pavilions, reaching Sok Kwu Wan in about 90 minutes, where seafood restaurants line the harbour. Take the ferry back from Sok Kwu Wan to Central in the late afternoon.

Signal Coverage is generally good on Lamma, with occasional dips in the hollows of the trail. Signal stays usable on the ferry close to Hong Kong Island.
Day 7 Hong Kong Island

Kowloon temples and markets, then departure

The MTR links all of today's stops; Airport Express from Kowloon station takes about 20 minutes.

Spend the morning at the Wong Tai Sin Temple, then walk to Chi Lin Nunnery and the Nan Lian Garden, a classical Tang-style garden at Diamond Hill. Go on to Mong Kok for the Goldfish Market and Flower Market Road, or Sham Shui Po's electronics and fabric streets. Check in at Hong Kong or Kowloon station in the afternoon and take the Airport Express.

Signal 5G is strong throughout Kowloon and at the airport. Use your last hours of fast data for boarding passes and photo uploads.

Staying connected on this route

Near the western end of Lantau and on boats towards Macao, check your phone stays on csl or SmarTone rather than a Macao or mainland network.
Download offline maps of Sai Kung East and the Lantau trails, where coverage is patchy.
Check the Hong Kong Observatory app for typhoon signals; ferries and the Ngong Ping cable car stop at Signal 8.
Be mindful of national security laws when posting or carrying sensitive files on your devices.

Itinerary sources · 4

gov.uk Hong Kong travel advice: safety and security – GOV.UK
en.wikipedia.org Airport Express (MTR) – Wikipedia
en.wikipedia.org Ngong Ping 360 (Wikipedia)
en.wikipedia.org Telecommunications in Hong Kong – Wikipedia

Where this comes from

Information and verification

Each block below says what was checked and when. Anything we cannot date, we do not claim.

Prices and plans: Every price and allowance on this page is read from the live catalog, not typed in.; Verified October 30, 2026
Host networks: The operator list comes from the network partner that carries this eSIM.; Verified October 30, 2026