Short answer: Singtel's hi! Tourist eSIM is the most generous tourist plan in Southeast Asia — 100 GB from around S$12. Whether that is a good deal depends almost entirely on how long you are staying. Singapore is a short-stay country: a great many visitors are there for two or three days, or passing through Changi on a layover. If that is you, you are buying 100 GB to use two of them, and you still have to hand over your passport at a counter to do it.
This guide covers what Singtel actually sells, the passport rule that changed in July 2024, how Changi pickup works in practice, how Singapore's free public Wi-Fi changes the maths, and when a travel eSIM makes more sense — including the cases where it does not.
What Singtel's hi! Tourist plans include
Singtel is Singapore's largest operator and its tourist range is sold under the "hi!" brand, as both a physical SIM and an eSIM. Three tiers, and the headline number is the same across them:
- S$12 — 100 GB, 4G, 14 days, local calls and SMS included
- S$15 — 100 GB, mid-tier validity
- S$30 — 100 GB, 5G, 28 days, unlimited local calls and SMS
All tiers bundle international dialling minutes to selected destinations, including 100 IDD minutes to Myanmar — a detail that tells you who these plans were originally designed for, and one that is genuinely useful if you are calling that part of the region.
Coverage is not a differentiator here in the way it is elsewhere. Singapore is 730 square kilometres of dense, well-served city-state. Singtel, StarHub, M1 and SIMBA all deliver strong signal essentially everywhere you will go, including the MRT tunnels. Nobody is choosing a Singapore SIM for better reception in the countryside, because there is very little countryside.
The passport rule that changed in July 2024
Singapore requires every prepaid SIM to be registered to an identity document. For visitors that means your passport, presented at the point of sale. Unlike some countries in the region, you do not need to produce a local address or an onward ticket.
Since 15 July 2024, a rule has applied that catches people out: a prepaid SIM registered with a passport is valid for 30 days. Extending beyond that requires proof of legal residency in Singapore. If you are a tourist, you do not have that, and the line expires.
For the overwhelming majority of visitors this is irrelevant — almost nobody spends more than 30 days in Singapore on a tourist visit. It matters in one specific case: people who come and go repeatedly for business, expecting to keep the same Singapore number alive between trips. That does not work on a passport-registered prepaid line.
The registration itself is quick and the staff do it for you. The friction is not bureaucratic, it is temporal: it happens at a counter, in a queue, after a flight.
Buying at Changi: how it actually goes
Singtel has pickup points across all Changi terminals and in city-centre shops, which is genuinely convenient as these things go.
The realistic sequence: clear immigration, find the counter, queue behind other arrivals doing the same thing, hand over your passport, wait for registration, install or insert. On a quiet arrival this is ten minutes. When several long-haul flights land together — which at Changi is most of the time — it can be considerably longer.
Two things worth knowing:
- Changi has excellent free Wi-Fi. You are not stranded while you queue, and you can install a travel eSIM on airport Wi-Fi in about the time it takes to walk to baggage claim.
- Counter hours vary by terminal. Late-night and early-morning arrivals can find some outlets closed, which is precisely when you least want to be solving a connectivity problem.
Singapore's free Wi-Fi genuinely changes the maths
This is the part most eSIM guides skip because it does not help them sell anything.
Singapore has one of the densest public Wi-Fi networks in the world. Wireless@SG covers libraries, community centres, MRT stations, malls and much of the public realm, and virtually every café, hotel and shopping centre offers its own. If your itinerary is Marina Bay, Orchard Road, Sentosa and Chinatown, you will pass through covered space almost continuously.
What that means in practice: your actual mobile data consumption in Singapore is likely to be low. Maps between stops, ride-hailing, messaging, the occasional search. A three-day visit of that shape rarely exceeds 1–2 GB.
Which reframes the 100 GB headline. It is not a bad plan — it is an enormous plan sold to people who will use one or two per cent of it. That is fine if the price is low enough that you do not care. It is worth pausing over if you are comparing S$12 against a plan that costs a dollar or two.
The honest caveat: public Wi-Fi is public. Anything you would not want intercepted — banking, work email, document access — deserves a VPN, whichever connection you are on.
How to install an eSIM, whichever one you choose
The mechanics are the same for a Singtel eSIM and a travel eSIM. What differs is when you can do it.
- Check your phone is eSIM-capable and carrier-unlocked. A locked phone accepts the profile and then refuses to connect — a miserable thing to discover in an arrivals hall.
- Install over Wi-Fi. Changi's network is fine for this. Installation needs a connection; the eSIM cannot install itself.
- Scan the QR code or use one-tap install. iPhone: Settings → Mobile Service → Add eSIM. Android: under Network & Internet → SIMs, though the exact path varies by manufacturer.
- Label the line something obvious like "Singapore data", because you will be switching between profiles.
- Set the data line and turn data roaming off on your home SIM. Skipping this is how people end up paying their home carrier on top of the plan they just bought.
A travel eSIM can be installed days before departure, with the plan starting when it first connects to a Singapore network. A Singtel tourist line needs the counter first.
If the QR code will not work
Nearly every failed install comes down to one of four causes: the phone is carrier-locked; there was no Wi-Fi during installation; the profile was installed once and deleted, and most QR codes are single-use; or the handset is a market variant with eSIM disabled. Checking before you buy removes most of the risk — our eSIM compatibility checker takes a few seconds.
When a travel eSIM is the better tool
Singapore's registration rules exist to identify local subscribers. A travel eSIM does not make you one: it connects your device to the same local towers as a roaming visitor, outside the registration regime.
Practically:
- No passport at a counter, no queue after a flight
- Install at home, connected when the plane doors open
- No 30-day registration clock
- Your home number stays live on your primary SIM for bank codes and WhatsApp
- Sized to what you will actually use, rather than 100 GB you will not
And the honest trade-off: you do not get a Singapore phone number. If you need to receive local SMS — some domestic services and certain delivery or banking flows insist on it — a registered local SIM is the right answer, and no travel eSIM replaces it. For maps, ride-hailing accounts you already hold, messaging and work, data alone is enough.
There is one Singapore-specific case where the local number genuinely wins: if you are here for business meetings and need a callable local number for a week, hi! Tourist at S$30 with unlimited local calls is a sensible purchase. Buy it for the number and the calls, not for the 100 GB.
How much data will you actually use?
Rough hourly figures, useful for planning rather than precision:
- Maps and navigation — around 5 MB per hour of active guidance
- Messaging and email — a few MB a day
- Social media scrolling — 100–150 MB per hour, more with video autoplay
- Video calls — 500 MB to 1 GB per hour
- Streaming video — around 1 GB per hour at standard definition, 3 GB or more at HD
Applied to a typical Singapore trip: a two-day stopover is comfortably under 1 GB. Four or five days of sightseeing with heavy Wi-Fi use lands around 1–3 GB. A week of remote work with daily video calls is a different animal — 10–20 GB, and at that point the large local bundles start to make sense.
What it costs to just have data
Cellesim Singapore eSIM plans start at $1.05, install with one tap and are live before you land. Every active plan includes a free VPN — which, given how much of your Singapore browsing will happen on public Wi-Fi, is more useful here than in most destinations.
The comparison is not "cheap versus expensive". It is "sized versus oversized". If you need a local number and unlimited local calls, buy Singtel. If you need data for a few days, buying 100 GB is paying for storage you will never open.
Singtel, StarHub, M1 or SIMBA?
All four cover Singapore well and all four are subject to the same passport registration rule.
Singtel has the largest retail footprint and the most visible Changi presence, which is why most visitors end up with it. StarHub and M1 compete on price and run comparable tourist bundles. SIMBA is the value option, popular with residents, and typically the cheapest per gigabyte — but it is aimed at people staying, not visiting.
For a short visit the differences between them are far smaller than the difference between queueing at a counter and not queueing at all.
Frequently asked questions
Do I need a passport to buy a Singtel tourist SIM?
Yes. Singapore requires prepaid SIMs to be registered to an identity document, and for visitors that is a passport, presented at the point of sale. You do not need a local address.
Does a travel eSIM need registration in Singapore?
No. A travel eSIM connects you as a visiting device rather than a Singapore subscriber, so the registration requirement and the 30-day passport-registration limit do not apply.
Is 100 GB really useful for a short trip?
Realistically, no. Between Wireless@SG and near-universal café, mall and hotel Wi-Fi, most visitors use 1–3 GB across an entire stay. The 100 GB is a headline number, not a usage forecast.
Can I keep my own number while using a Singapore eSIM?
Yes, on any dual-SIM phone. Keep the home SIM active for calls and verification codes and set the eSIM as your data line. Turn data roaming off on the home SIM so it cannot bill you quietly.
Will my phone work with an eSIM?
Most phones released since 2018: iPhone XS and later, Google Pixel 3 and later, Samsung Galaxy S20 and later, and many mid-range models since. The phone must also be carrier-unlocked. Check yours with our eSIM compatibility checker.
Is there mobile signal on the MRT?
Yes, throughout the underground network, on every operator. Singapore is unusually well covered underground compared with most metro systems.
What about a Changi layover — is it worth buying anything?
For a layover inside the airport, no. Changi's free Wi-Fi is fast and easy to join. If you are leaving the terminal to see the city for a few hours, a small travel eSIM is worth it so ride-hailing and maps work the moment you step outside.
Can I use a Singapore eSIM in Malaysia or Indonesia?
A Singtel hi! Tourist line is for Singapore; using it across the causeway means roaming charges. If your trip covers several countries in the region, a regional plan covering multiple destinations is usually cheaper than buying a separate local SIM in each one.
Can I tether or use hotspot?
Generally yes, on both local prepaid bundles and travel eSIMs. Remember a tethered laptop consumes data much faster than a phone — background sync and updates are usually the culprit.
Should I buy before I fly or at Changi?
If you want a Singapore number, buy at Changi; it cannot be done otherwise. If you only need data, buying in advance is strictly better — you land connected, skip the queue, and can compare prices calmly rather than at a counter.
Planning the trip? Compare data plans on our Singapore eSIM page, install in one tap before you fly, and land online. Free VPN included.
