Do I need an eSIM for Singapore?

You don't need one, but it's usually the fastest way to get connected straight from Changi Airport.

Which network should I pick in Singapore?

Any of M1, SingTel or Starhub gives strong coverage islandwide, so it mostly comes down to price.

Is 5 GB enough for a week in Singapore?

For normal use (maps, messaging, some social media), yes comfortably; heavy streaming will use it up faster.

Can I keep my home number active alongside the eSIM?

Yes, the eSIM runs as a second line for data while your physical SIM stays active for calls and texts.

What happens when I run out of data on a non-unlimited plan?

On ONE eSIM's fixed-data plans you can buy a top-up; on daily-cap plans, speed drops rather than cutting off.

Best eSIM for Singapore 2026: 5 Providers Priced

Singapore eSIM prices checked 27 Oct 2026: ONE eSIM is cheapest at 4 of 5 sizes from 1 to 20 GB, from $1.51 for 1 GB.

Short answer: ONE eSIM has the cheapest 1 GB eSIM for Singapore at $1.51 for 7 days; the next cheapest is Saily at $3.99. Prices checked 27 October 2026 across ONE eSIM, Airalo, Holafly, Saily and Nomad; the full table is below.

Whether Singapore is a stopover or the whole trip, most travellers want data working the second they clear Changi Airport. Buying an eSIM in advance is the simplest way to arrive connected. We compared ONE eSIM, Airalo, Holafly, Saily and Nomad for Singapore on 27 October 2026.

Quick answer: Singapore eSIM prices by size

1 GB: ONE eSIM at $1.51 (7 days); next cheapest is Saily at $3.99 (7 days).
3 GB: ONE eSIM at $3.99 (15 days); next cheapest is Airalo at $6.50 (3 days).
5 GB: ONE eSIM at $6.63 (30 days); next cheapest is Airalo at $9.00 (7 days).
10 GB: ONE eSIM at $12.93 (30 days); next cheapest is Airalo at $15.00 (7 days).
20 GB: Airalo is cheapest at $22.00 (15 days); ONE eSIM is $22.55 (30 days). Best value: 2× the days of Airalo's plan for $0.55 more.

Singapore eSIM prices compared (1 GB to 20 GB)

Singapore eSIM prices in USD: each provider's cheapest plan at or above the size, validity in brackets. Cheapest marks the lowest price. Where another provider is cheaper, a note under ONE eSIM shows where it still wins: more data for the money, a lower price per GB, or more days. Checked 27 October 2026.
Data	ONE eSIM Our price	Airalo	Holafly	Saily	Nomad
1 GB	$1.51 (7 days) Cheapest, saves $2.48	$4.00 (3 days)	–	$3.99 (7 days)	$4.00 (7 days)
3 GB	$3.99 (15 days) Cheapest, saves $2.51	$6.50 (3 days)	–	$6.99 (30 days)	$6.50 (30 days)
5 GB	$6.63 (30 days) Cheapest, saves $2.37	$9.00 (7 days)	–	$9.99 (30 days)	$9.00 (30 days)
10 GB	$12.93 (30 days) Cheapest, saves $2.07	$15.00 (7 days)	–	$15.99 (30 days)	$16.00 (30 days)
20 GB	$22.55 (30 days) Best value: 2× the days for $0.55 more	$22.00 (15 days) Cheapest	–	$22.99 (30 days)	$25.00 (30 days)

Holafly sells only unlimited plans for Singapore, so it has no price in the GB rows; its 7-day plan is in the week table below.

A week of unlimited data in Singapore

7 days of unlimited data in Singapore: ONE eSIM's daily plan bought for 7 days against 7-day unlimited plans, with what each gives a day. USD, checked 27 October 2026.
Provider	7 days	What you get
ONE eSIM	$9.66	1 GB a day at full speed, then 1 Mbps until the next day (7 × $1.38)
Airalo	$27.00	3 GB a day at full speed, then 1 Mbps (fair use)
Holafly	$27.50	No daily cap; fair use may slow very heavy use
Saily	$26.99	5 GB a day at full speed, then up to 1 Mbps
Nomad	–	No 7-day unlimited plan

For a week, ONE eSIM's 1 GB a day plan is the cheapest way to stay online all day at $9.66. The cheapest of the others is Saily at $26.99, which gives more full-speed data a day; compare by how much you use a day, not by the word unlimited.

Networks and coverage in Singapore

ONE eSIM's Singapore plans run on M1, SingTel and Starhub, with 4G listed on these plans. Singapore is small and densely covered, so network choice matters less here than in larger countries — all three operators give strong coverage across the island.

Which eSIM should you choose for Singapore?

Short trip, light use (up to 3 GB): ONE eSIM's 3 GB plan at $3.99 (15 days), the cheapest at that size.
Two weeks or more (5 to 10 GB): ONE eSIM's 10 GB plan at $12.93 (30 days), the cheapest at that size.
Heavy use (20 GB): Airalo at $22.00 (15 days) is the cheapest at 20 GB; ONE eSIM is the best value (2× the days for $0.55 more).
Streaming or video calls every day: compare the unlimited plans above by how much full-speed data each gives a day.

How to set up your Singapore eSIM

Check your phone supports eSIM (most iPhones since the XS and Android flagships since 2019 do).
Buy and install the eSIM on Wi-Fi before you fly, so the QR code or install link downloads without using mobile data.
Turn on the new eSIM line and enable data roaming once you land in Singapore, then switch off your home SIM's data to avoid charges.

Singapore eSIM FAQ

Do I need an eSIM for Singapore? You don't need one, but it's usually the fastest way to get connected straight from Changi Airport.
Which network should I pick in Singapore? Any of M1, SingTel or Starhub gives strong coverage islandwide, so it mostly comes down to price.
Is 5 GB enough for a week in Singapore? For normal use (maps, messaging, some social media), yes comfortably; heavy streaming will use it up faster.
Can I keep my home number active alongside the eSIM? Yes, the eSIM runs as a second line for data while your physical SIM stays active for calls and texts.
What happens when I run out of data on a non-unlimited plan? On ONE eSIM's fixed-data plans you can buy a top-up; on daily-cap plans, speed drops rather than cutting off.

How we check prices

We read each provider's public Singapore page on 27 October 2026 and took its cheapest plan at or above each size, in US dollars before any coupon, with the validity in brackets; ONE eSIM prices are our live list prices on the same day. Prices move, so we re-check every month and keep the date on the page and in the short answer. If a number is out of date, write to support@oneesim.app and we will correct it.