Singapore has some of the best mobile coverage in the world, and buying a SIM is straightforward — the only real decision is physical SIM versus eSIM, and tourist package versus a proper local plan if you’re staying longer.
The three carriers
Singtel is the largest and has the widest network reach, with the most airport counters and retail stores — the safe default if you want maximum coverage and don’t want to think about it further. StarHub is a close second on network quality and often slightly cheaper on tourist SIM bundles. M1 is the smallest of the three but still solid within the city and generally the most competitively priced for prepaid data — worth checking if you’re on a tight budget and don’t need the absolute widest coverage (Singapore is small enough that all three networks cover the whole island well in practice).
Tourist SIM prices
A standard tourist SIM with 15-50GB of data valid for 7-12 days runs roughly S$15-30 depending on the carrier and data allowance, usually bundled with some local call/SMS credit. All three carriers run counters at Changi Airport arrivals — convenient for landing and getting online immediately, but typically 20-30% pricier than buying the same or a similar package in town.
At the airport
Singtel, StarHub and M1 all run counters at Changi arrivals, selling tourist SIMs with a set data allowance valid for a fixed number of days. Convenient, slightly pricier than buying in town — worth it if you land late or just want one less thing to sort out on day one. Bring your passport; it’s required for SIM registration under Singapore’s regulations, no exceptions for tourists.
eSIM options
If your phone supports eSIM, providers like Airalo, Holafly and the carriers’ own eSIM products let you buy and activate a Singapore data plan before you even land — worth it if you want connectivity the moment you’re off the plane, without queueing at an airport counter. Airalo’s Singapore plans typically run US$5-25 depending on data volume, often cheaper than the equivalent physical tourist SIM, with the tradeoff being data-only (no local phone number) on most of the cheaper packages.
Longer stays and prepaid
For digital nomads or anyone staying more than a couple of weeks, a prepaid SIM from a convenience store (7-Eleven carries several) works out cheaper than the airport tourist packages, and top-ups are easy everywhere — convenience stores, carrier apps, and retail outlets all handle top-ups quickly. A monthly prepaid plan with generous data typically runs S$20-35, considerably better value than repeatedly buying short tourist bundles if you’re staying a month or more.
Postpaid, for anyone relocating
If you’re actually moving to Singapore rather than visiting, a postpaid contract SIM (12-24 month terms are standard, though SIM-only no-contract postpaid plans exist too) from any of the three carriers is generally the best value long-term, with better data allowances and often bundled perks. You’ll need an Employment Pass or long-term visa and proof of address to sign up for most postpaid plans — see our moving to Singapore guide for the fuller relocation picture.
Wifi
Coverage is excellent almost everywhere — cafes, malls and hawker centres generally have free wifi, so even without a local SIM you’re rarely offline for long. Wireless@SG, the government-backed free public wifi network, also covers much of the city including MRT stations, though speeds and reliability vary and it shouldn’t be relied on as your primary connection for work.
Which to choose
Short trip (under a week): buy an eSIM before you land, skip the airport queue. Week-to-two-weeks: airport tourist SIM if you land late and want it sorted immediately, otherwise a convenience-store prepaid SIM in town is cheaper. A month or more: prepaid monthly plan from any convenience store or carrier retail outlet. Actually relocating: postpaid once your visa and address are sorted.
Registration and requirements
All prepaid SIMs in Singapore require ID registration at point of sale — passport for tourists, passport plus visa/pass details for longer-term residents. This applies whether you buy at the airport, a convenience store, or a carrier retail outlet; there’s no way around it, and it only takes a couple of minutes at the counter.
Roaming as a fallback
If you’re only in Singapore for a day or two as part of a wider Southeast Asia trip, some travellers just use their home carrier’s roaming rather than bothering with a local SIM — worth checking your home plan’s roaming rates first, since Singapore’s excellent public wifi coverage means you can often get away with wifi-only plus minimal roaming for a very short stay.
eSIM specifics: which carriers actually support it
All three local carriers — Singtel, StarHub and M1 — issue eSIMs for tourists and residents alike, and iPhones from the XS onward plus most flagship Android phones from the last four or five years support eSIM natively; check your specific model before relying on it, since some dual-SIM-physical variants sold outside certain markets don’t. Airalo and Holafly are the two most reliable third-party eSIM marketplaces for Singapore — Airalo sells data-metered plans (1GB to 20GB, roughly S$7-35 depending on size) while Holafly sells unlimited-data plans at a flat rate for a fixed number of days, better value if you know you’ll be streaming or hotspotting heavily. Activation is done entirely online before you land: buy the plan, scan the QR code it emails you, and the eSIM installs — it’s genuinely useful to activate it before departure so you land with data already working, rather than fumbling with airport wifi to buy one. The catch with most tourist eSIMs is they’re data-only, no local phone number attached — fine for maps and messaging apps, not fine if you need to receive an SMS verification code from a Singapore bank or service.
Tourist SIM vs local number: does it matter?
For a short trip, a data-only eSIM or a basic tourist SIM is all you need — nobody’s calling your Singapore number. It starts to matter the moment you need to interact with anything requiring local SMS verification: opening a bank account, signing up for certain ride-hailing or food delivery promotions, or registering for government digital services (SingPass, used for everything from tax filings to some retail loyalty programs) all expect a Singapore mobile number. If you’re staying more than a few weeks, or moving here properly, getting a real local SIM with a number attached — rather than a data-only eSIM — saves this friction later. Prepaid SIMs from any of the three carriers come with a number by default and can be bought at the airport, a 7-Eleven, or a carrier retail store with just your passport.
Data-only vs full SIM: picking the right option
Data-only eSIMs (Airalo, Holafly, and the carriers’ own tourist eSIM products) are the simplest option if you just need maps, messaging apps, and social media to work — cheapest per GB, no number, no commitment. A full prepaid SIM with a number costs a little more but unlocks local SMS verification and lets people actually call you, worth it for stays over a couple of weeks or any trip involving admin (banking, co-working memberships, deliveries under your own name). Postpaid plans, which require a local bank account or a longer-term pass, aren’t worth considering unless you’re actually relocating rather than visiting.
Roaming alternatives worth knowing about
If your home carrier offers a reasonable international roaming add-on, it’s sometimes genuinely competitive with a local SIM for a short trip, purely for the convenience of keeping your existing number active — worth checking your specific carrier’s Singapore/Southeast Asia roaming rate before assuming a local SIM is always cheaper, since some home-market roaming passes are flat-rate and cost-competitive once you factor in the hassle of swapping SIMs. Portable wifi (MiFi) rental, once popular at the airport, has mostly been made redundant by cheap eSIMs and is rarely worth the extra device and daily rental fee unless you’re travelling with a group sharing one connection or specifically need a device with a long battery life independent of your phone.