Best Singapore SIM and eSIM: Plans, Prices and Which to Buy

1. Coverage is not the question here

Singapore was the first country covered end to end by standalone 5G, so no operator will let you down on signal. Singtel passed 95% nationwide standalone coverage back in 2022, the build finished across the island, and through 2026 the operators have been migrating customers from the older non-standalone setup onto it.

That removes the question that dominates SIM guides for larger countries. There is no rural gap to plan around, no operator that fades outside the capital, no mountain range to check. The island is 50 kilometres across and every operator covers it.

So the decision moves to the plan itself, and three things separate them.

Every package and price, side by side: the full eSIM cost calculator

2. A passport-registered SIM stops after 30 days

Since 15 July 2024 a prepaid SIM registered against a foreign passport carries a maximum validity of thirty days. After that it is suspended, and there is no refund on whatever credit is left. Keeping the same number past thirty days means re-registering in person with a Singapore-issued identity card or work pass, which a visitor does not have.

This is an IMDA rule rather than an operator policy, so switching provider does not avoid it.

For a week in Singapore none of this bites. It matters in three situations: a stay longer than a month, a trip that leaves and returns expecting the same SIM to still work, and anyone planning to top up a number kept from a previous visit. In all three the answer is to treat the SIM as disposable and buy fresh.

3. Singapore SIMs come with regional data attached

This is the part most comparisons skip, and it decides the purchase for anyone whose trip does not stop at the causeway. A Singapore tourist SIM is not only a Singapore SIM. StarHub’s published tourist plans read like this.

All three include unlimited local calls and texts plus 100 minutes of roaming calls. Read against a day trip to Johor Bahru, a few nights in Kuala Lumpur or a Bali leg, that regional allowance is the difference between one purchase and two.

4. Which eSIM to buy, and what each costs

This is where the choice actually gets made. The brands price on different structures, and that gap doubles the bill. Straight from what each publishes for Singapore:

Set that against the usage figures above and the answer falls out. A traveller on maps, messaging and Grab uses under 2 GB a week, which makes Yesim’s 5 GB at $11.52 for 30 days the fit, while the same money buys three days of unlimited from Airalo. Unless the trip really is three days, capped wins.

Either way an eSIM is data-only, so there is no local number. If a hotel or a restaurant holding a booking may need to call you, go to the physical SIM in the next section.

5. The other operators

Singapore has four operators. Singtel, StarHub and M1 all sell at Changi; Simba sells only in town. Their prices sit close enough together that cost alone rarely decides it.

What decides it are the three fields above: validity, calls, and regional data. StarHub is the one that publishes the regional allowance plan by plan, which is why the tables here use its figures. Other operators also sell plans with roaming attached, but the terms have to be checked in store or in the app.

Simba is the cheapest per gigabyte. It is also not sold at the airport, so you leave Changi without data and find a shop in town. Reasonable on a repeat visit, poor on a first one.

6. Where to buy at Changi

Singtel, StarHub and M1 all sell at Changi, and the counters sit in the arrival halls of Terminals 1, 2, 3 and 4. StarHub is handled through Prosegur and StarHub Changi Recommends counters. Ordering online in advance for airport pickup is supported and saves queueing behind a full flight.

Bring the passport you entered on. Registration happens at the counter and takes a couple of minutes.

7. Check that your handset takes an eSIM

Two conditions before buying anything digital: the phone supports eSIM, and it is carrier-unlocked.

Dial *#06#. If an EID appears, the handset takes an eSIM. You can also look for “Add eSIM” in the network settings.

8. How much data you will actually use

Every Singapore plan sells in hundreds of gigabytes, which makes the headline numbers meaningless. Nobody uses 300 GB on a holiday. What follows is a realistic week.

So the allowance is never the deciding factor in Singapore. Compare validity, calls and regional data instead, because those are the fields that actually differ.

9. Wireless@SG is better than most free WiFi

Singapore’s public network is part of the Smart Nation programme and covers cafés, food centres, malls, libraries, the airport and many attractions. Visitors can use it. If your device is not on a supported plan, you log in through any browser using a mobile number.

It is genuinely good compared with the free WiFi in most cities, and it still does not replace a SIM. The reason is the same everywhere: it works while you are sitting down, and the moments you need data are the ones where you are moving. Finding the right MRT exit, checking whether a hawker stall is open, calling a Grab in the rain.

Treat it as the thing that carries the heavy lifting: downloads, video, uploading photos. Buy a modest data allowance for everything else and the combination costs very little.

10. Installing and switching on

Downloading an eSIM profile needs a connection, so install before you fly rather than in the arrival hall.

On iOS: Settings, then Cellular, then Add eSIM, scan the QR, label the line, set it as the data line, and turn on data roaming for that line. That roaming switch is not your home carrier’s roaming; it tells the phone to use the Singapore line and carries no charge. Then switch data off on the home line.

On Android: Settings, then Network or Connections, then SIMs, add the eSIM, set it as the preferred data SIM and enable roaming on it.

Keep the home line able to receive calls and texts for bank codes, with only its data switched off.

11. What fits which trip

Everything above, arranged by the trip you are taking. Each row points at the product that fits.

12. The check before you fly

Six things, and skipping any of them is where the arrival-hall delay comes from.

On arrival: airplane mode off, Singapore line set as the data line, roaming enabled on that line. Nothing else.

13. Other Singapore guides worth reading

With connectivity settled, the rest is getting around, sleeping and eating.

Frequently asked questions

The rest of the planning sits in our Singapore travel guide

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