O2 roaming in Singapore: what it costs, and when an eSIM is cheaper
Data in Singapore is included with Ultimate Plans (O2 Travel Inclusive Zone Ultimate). Otherwise, it costs £7.00/day (O2 Travel Bolt On). An eSIM for 7 days and 6 GB costs from $11.00 (Ubigi).
Rates checked on October 21, 2026 in the official price guide · Source: O2
The best eSIMs in Singapore for a week
For 7 days and 6 GB
- 1Best unlimited
GigSky
Unlimited · 7 days
$24.49$3.50 per day- 3.5 GB a day at full speed, then 500 kbps
- Networks: Singtel and StarHub
- Hotspot allowed
- 2Cheapest
Ubigi
10 GB · 7 days
$11.00$1.10 per GB- Lowest total price for 7 days
- Networks: SIMBA and StarHub
- Hotspot allowed
- 3Best price per GB
GoMoWorld
17 GB · 30 days
$12.99$0.76 per GB- Lowest price per GB for this trip
- Hotspot allowed
Three steps, three questions: the best unlimited plan, the cheapest and the best price per GB, from three different providers. How we pick the podium · Affiliate links
O2 or an eSIM in Singapore: our verdict
Depending on your plan and trip length, at the prices read on October 22, 2026.
If your plan includes Singapore
Keep O2
With Ultimate Plans (O2 Travel Inclusive Zone Ultimate), data in Singapore is included at no extra cost, within your allowance abroad.
Otherwise, with O2
£7.00/day
O2 Travel Bolt On. For 7 days and 6 GB, expect £49.00.
Affiliate links
Data in Singapore with O2: our analysis
What O2’s rate sheet and eSIM prices show, as checked on October 22, 2026.
The right pass for your trip length
- 3 days3 × O2 Travel Bolt On£21.00
- 1 week7 × O2 Travel Bolt On£49.00
- 2 weeks14 × O2 Travel Bolt On£98.00
- 1 month30 × O2 Travel Bolt On£210.00
Against the cheapest eSIM
O2 charges in GBP and the cheapest eSIM is sold in USD: we convert nothing. For a week, expect £49.00 with O2 and $11.00 with the eSIM (Ubigi).
eSIMs in Singapore at a glance
- In Singapore, we compare plans from 7 eSIM providers: Airalo, GigSky, GoMoWorld, Nomad, Orange Travel, Ubigi, and Yesim.
- The cheapest unlimited plan for a week is from GigSky: $24.49 (Unlimited · 7 days).
- Locally, the cheapest prepaid SIM card for a week costs S$10 (Singtel, 500 GB, 7 days); see our SIM card comparison in Singapore.
O2 applies the same rate in 14 other destinations we track, including Australia, Canada, China, Egypt, and India.
Plan by plan
What applies in Singapore depending on your O2 plan.
What O2’s official rate sheet sets out in Singapore, offer by offer. “Included” means at no extra cost, within your allowance abroad: your O2 account shows the one on your line.
| Plan or offer | Data in Singapore |
|---|---|
| O2 Travel Bolt On | £7.00/day |
| Ultimate Plans (O2 Travel Inclusive Zone Ultimate) | Included |
What your trip costs
With the O2 roaming rate, against today’s cheapest eSIM, for everyday use.
| Trip | With O2 | Cheapest eSIM | The offer |
|---|---|---|---|
| 3 days · 3 GB | £21.00 3 × O2 Travel Bolt On | $4.99 GoMoWorld | See the plan |
| 7 days · 6 GB | £49.00 7 × O2 Travel Bolt On | $11.00 Ubigi | See the plan |
| 14 days · 12 GB | £98.00 14 × O2 Travel Bolt On | $12.99 GoMoWorld | See the plan |
| 30 days · 24 GB | £210.00 30 × O2 Travel Bolt On | $22.00 Ubigi | See the plan |
Affiliate links
Singapore with other UK carriers
The same trip with the other UK carriers we track, from their official rate sheets.
Of the 4 UK carriers we track, 3 include Singapore in at least one plan: EE, O2, and Three.
EE
Three
VodafoneTurn off O2 roaming and use an eSIM
Four settings, before you leave or on the plane.
- 1
Install the eSIM at home
Buy it and scan its QR code before you leave: with most providers, the plan only starts when you first connect at your destination.
- 2
Keep O2 for calls
In your settings, keep your O2 line for calls and texts, and pick the eSIM for mobile data.
- 3
Turn off O2 roaming
On iPhone: Settings › Cellular › your O2 line › Data Roaming. On Android: Settings › Mobile networks › Roaming.
- 4
Keep eSIM roaming on
A travel eSIM uses the local networks: its data roaming must stay on.
O2 roaming in Singapore: your questions
Answered from the O2 price guide and today’s prices.
Is data in Singapore included in my O2 plan?
Yes, with Ultimate Plans (O2 Travel Inclusive Zone Ultimate). Otherwise, it costs £7.00/day (O2 Travel Bolt On).
How much does data cost in Singapore with O2?
£7.00/day (O2 Travel Bolt On), so £49.00 for 7 days and 6 GB. An eSIM covering the same week costs from $11.00 (Ubigi), checked on October 22, 2026.
Which O2 pass should I get for Singapore?
The best O2 option depends on how long you stay: for 3 days, 3 × O2 Travel Bolt On (£21.00); for a week, 7 × O2 Travel Bolt On (£49.00); for two weeks, 14 × O2 Travel Bolt On (£98.00); for a month, 30 × O2 Travel Bolt On (£210.00).
O2 or an eSIM in Singapore: which is cheaper?
O2 charges in GBP and the cheapest eSIM is sold in USD: we convert nothing. For a week, expect £49.00 with O2 and $11.00 with the eSIM (Ubigi).
Which UK carriers include Singapore?
Of the 4 UK carriers we track, 3 include Singapore in at least one plan: EE, O2, and Three.
Which network does an eSIM use in Singapore?
The cheapest one-week eSIM (Ubigi) uses SIMBA and StarHub. Depending on the plan, the 7 providers we compare in Singapore list Singtel, M1, StarHub, and SIMBA.
How do I avoid roaming charges in Singapore?
Use a travel eSIM for data and turn off data roaming on your O2 line. You keep your number for calls and texts.
Can I keep my O2 number with an eSIM?
Yes, on an eSIM-compatible phone: your O2 line stays on for calls and texts while the eSIM carries the data.
China
India
Indonesia
Japan
South Korea
Thailand
Vietnam