How to Buy and Install a Singapore eSIM Before You Fly
Last updated: July 23rd, 2026
A Singapore eSIM lets you land at Changi already online — no SIM counter, no passport form, no swapping out your home SIM. This guide walks through buying one, installing it on an iPhone or Android before you fly, and switching it on the moment you touch down. The whole process takes about five minutes, and you can do it from your sofa a week before the trip.
Singapore is one of the easiest places in the world to use an eSIM. Coverage is excellent island-wide on every network, Changi has fast free WiFi if you need it, and a data eSIM sidesteps the passport registration that local prepaid SIMs require. Here is how to set one up.
Before you buy: does your phone support eSIM?
Almost every recent phone does, but it's worth a ten-second check so there are no surprises at the gate.
eSIM-compatible phones
- iPhone: XR, XS, and every model since (including SE 2020 and later)
- Samsung: Galaxy S20 and later, Z Flip and Z Fold, most Note 20 models
- Google Pixel: Pixel 3 and later (some carrier-locked Pixel 3 units excepted)
- Quick check: dial *#06# — if you see an EID number alongside the IMEI, your phone supports eSIM
Your phone must also be carrier-unlocked. Phones bought outright or SIM-free always are; a phone still on a carrier instalment plan may not be.
Step 1 — Buy your Singapore eSIM
Buy before you fly, while you still have your home connection. With Travelsim Asia there is no app to download and no account to create: you choose a plan, pay, and the eSIM lands in your inbox.
| What you do | What happens |
|---|---|
| Pick a data plan on the website | Plans run from 1 GB to 50 GB, all on StarHub |
| Pay by card | No account, no app, no sign-up |
| Check your email | Your eSIM arrives as a QR code and a tap-to-install link |
Not sure how much data to buy? Singapore is a light-data destination for most visitors — Grab, maps, messaging, and a bit of browsing. A 1 GB plan covers a short stopover, 5 GB a typical few-day city trip, and 10 GB a longer or heavier stay. Our Singapore buyer's guide breaks the options down.
Step 2 — Install the eSIM (before you fly)
Install at home while you have WiFi or mobile data. Installing does not activate the plan or start the clock — it just loads the eSIM onto your phone, ready to switch on when you land. Keep the confirmation email handy in case you need the QR code again.
On an iPhone
- Open the tap-to-install link from your email on the iPhone itself, or go to Settings → Cellular → Add eSIM and scan the QR code.
- Follow the prompts to add the plan. When asked, label it something like "Singapore" so it's easy to find.
- Leave your home line as your default. You'll switch the Singapore eSIM on after you land.
- Do not delete the eSIM once installed — deleting it removes the plan for good.
On an Android (Samsung, Pixel, and others)
- Go to Settings → Connections → SIM manager → Add eSIM (Samsung) or Settings → Network & internet → SIMs → Add eSIM (Pixel).
- Scan the QR code from your confirmation email. If you're viewing the email on the same phone, save the QR image and choose the "enter manually" or "upload image" option.
- Name the eSIM and finish adding it. Keep your home SIM as the default line for now.
- Menu wording varies slightly by brand and Android version, but the flow is the same everywhere.
Step 3 — Switch it on when you land at Changi
When you arrive, turn the Singapore eSIM into your active data line. This is the step that starts your plan.
- iPhone: Settings → Cellular → tap the Singapore eSIM → turn on Turn On This Line, then set Cellular Data to it and enable Data Roaming for that line.
- Android: Settings → SIM manager (or SIMs) → enable the Singapore eSIM, set it as the mobile data SIM, and turn on Roaming for it.
- Data roaming sounds scary but isn't here — a travel eSIM is prepaid, so "roaming" simply tells the phone to use the local StarHub network. There is nothing extra to be charged.
Keep your home number for calls and texts. Leave your home SIM enabled for calls and SMS (handy for bank codes), and set the Singapore eSIM as your data line. You get local data and keep your usual number reachable.
Do this the moment you land
Changi has strong free WiFi throughout the terminals, so even before you switch the eSIM on you can get online to book a ride. Two things worth doing straight away:
- Enable the eSIM before you leave the terminal. By the time you reach the taxi stand or MRT you'll have your own data and won't need to hunt for WiFi again.
- Install Grab before you fly. It's the main ride-hail app in Singapore and also handles food delivery and some payments. The MRT is fast and cheap, but Grab is useful for late arrivals and luggage.
- Save your confirmation email offline. It has your QR code and plan details if you ever need to reinstall.
eSIM vs a local SIM at Changi
Changi has SIM counters selling Singtel, StarHub, and M1 tourist SIMs. They work, but there's a catch that an eSIM avoids.
Local SIM at Changi
- Local Singapore number included
- Sold at arrival-hall counters
- Passport registration required — Singapore law requires ID registration for every prepaid SIM
- Counter queues after big arrivals
- Physical swap — your home SIM comes out and can get lost
eSIM (Travelsim Asia)
- Buy and install before you fly
- Online the moment you land — no queue
- Home SIM stays in, number stays reachable
- No passport registration, no physical swap
- No local Singapore number (use WhatsApp for calls)
Troubleshooting
- No data after landing? Check three things: the Singapore eSIM is set as your mobile-data line, Data Roaming is on for that line, and Airplane Mode is off. Toggling Airplane Mode on and off for a few seconds forces the phone to reconnect.
- Still nothing? Restart the phone. The network registration sometimes only completes after a reboot on arrival.
- Running low on data? Top up through the web portal linked in your confirmation email — no reinstall, no new eSIM, and the data is added to your existing plan.
- QR code won't scan? Use the tap-to-install link from the email instead, or save the QR image and upload it through your phone's "add eSIM" screen.
Dig deeper
- Best eSIM for Singapore (2026) — which provider to choose, compared on price, networks, and setup.
- Singapore eSIM Prices 2026 — Airalo, Holafly, Nomad, and more compared on price.
- Travelsim Asia vs Airalo Singapore eSIM — head-to-head on the two most popular options.
Stuck on setup? Our support team is available 24/7 by email and live chat — typical response under one hour.