Thailand and Singapore go hand in hand. With Bangkok just a 2-hour flight from Changi Airport, Thailand is one of the most popular holiday destinations for Singaporeans — whether it’s a long weekend in Bangkok, a beach trip to Phuket, or a family school-holiday getaway to Chiang Mai. In 2024, over 1 million Singaporeans visited Thailand [Tourism Authority of Thailand, 2024], making Singapore one of Thailand’s most consistent top-ten source markets despite Singapore’s small population.
With so many Singaporeans making repeat trips, the question of how to stay connected in Thailand — cheaply and reliably — is one worth getting right. In this guide, we compare exactly what Singtel, StarHub, and M1 charge for roaming in Thailand versus a dedicated Thailand eSIM, and show you the most cost-effective setup for every trip length.
Why use a Thailand eSIM instead of Singtel, StarHub, or M1 roaming?
A Thailand eSIM is a digital SIM you install on your phone before departure. The moment your flight lands in Bangkok, it connects automatically to Thailand’s 5G networks — no airport SIM queue, no physical card to swap, no unexpected bill when you return to Singapore.
Here’s why it makes sense for Singaporean travellers:
- Keep your Singapore number active: Dual-SIM phones (physical Singtel/StarHub/M1 SIM + Thailand eSIM) let you keep your Singapore number reachable for calls, WhatsApp, and banking OTPs.
- Far more data for less money: 35 GB for 7 days at USD $8.90 (~SGD $12) — versus SGD $20–$210 from Singapore carriers for the same trip.
- Perfect for frequent travellers: If you visit Thailand 2–3 times a year, setting up a Thailand eSIM takes minutes and costs a fraction of activating roaming each time.
- 5G coverage across Thailand: AIS and TrueMove H cover Bangkok, Phuket, Pattaya, Koh Samui, Chiang Mai, Krabi and all major tourist areas at 4G/5G speeds.
- Hotspot included: Share data with family on a group trip — no extra charge.
eSIM vs Singtel vs StarHub vs M1 – roaming price comparison for Thailand
Singapore carriers offer a range of roaming options for Thailand. Here’s a clear comparison for a typical 7-day trip – covering both data packs and unlimited daily options:
| Provider | Plan / option | Data | Cost for 7 days | Source |
|---|---|---|---|---|
| ThailandeSIM | 7-day plan | 35 GB high-speed | USD $8.90 (~SGD $12) | thailandesim.com, Jun 2026 |
| Singtel ReadyRoam Neighbours | Data pack | 1 GB per pack | SGD $25–$35 (5–7 packs) | singtel.com, Jun 2026 |
| Singtel DataRoam Unlimited Daily | Daily unlimited | Unlimited (fair use) | SGD $133 ($19/day × 7) | singtel.com, Jun 2026 |
| StarHub DataTravel Asia Pacific | Data pack | 3 GB / 30 days | SGD $20 (3 GB only) | starhub.com, Jun 2026 |
| StarHub DataTravel Unlimited | Daily unlimited | Unlimited (fair use) | SGD $210 ($30/day × 7) | starhub.com, Jun 2026 |
| M1 Daily Passport | Daily (3 GB/day reset) | 3 GB/day (~21 GB/week) | SGD $25.65 ($2.95/day + $5 activation) | nomadesim.com, Jun 2026 |
* Singtel ReadyRoam Neighbours is $5 per 1 GB pack — for a 7-day trip using ~5–7 GB, you would buy multiple packs. StarHub and Singtel unlimited daily plans subject to fair-use throttling. M1 Daily Passport requires a SGD $5 one-time activation fee. USD/SGD rate: ~1.35, June 2026.
The comparison is striking. Even the most competitive option — M1 Daily Passport at SGD $25.65 for 21 GB over 7 days — still costs more than double a ThailandeSIM at SGD $12 (~USD $8.90) for 35 GB. And Singtel or StarHub unlimited daily plans balloon to SGD $133–$210 for the same week.
Bottom line: For a 7-day trip to Thailand from Singapore, a ThailandeSIM at USD $8.90 (~SGD $12) gives you 35 GB of high-speed data — up to 53% cheaper than M1's Daily Passport and up to 94% cheaper than StarHub Unlimited Daily.
The one scenario where Singapore carrier roaming still makes sense: very short trips (1–2 days) where you expect minimal data usage. Singtel’s SGD $5 for 1 GB is reasonable for a day trip to Bangkok with light use. For anything 3 days or longer, or if you use data heavily for navigation and streaming, a ThailandeSIM wins on price and data volume.
How to get a Thailand eSIM from Singapore – step by step
Setup takes under 5 minutes and works best done at home in Singapore before your flight:
- Choose your plan by trip length:
- Weekend trip or school holiday (3–7 days): 35 GB / 7-day plan at USD $8.90 (~SGD $12) — more than enough for maps, streaming, and social media.
- Extended trip (8–15 days): Unlimited / 15-day plan at USD $24.90 (~SGD $34) — no data stress for longer stays.
- Frequent travellers: Consider the 30-day Unlimited at USD $44.90 (~SGD $61) if you visit Thailand multiple times a year — activated fresh each visit.
- Buy online: Purchase at ThailandeSIM.com. Pay in USD by card — your Singapore bank will apply the prevailing USD/SGD rate. QR code arrives in 5–10 minutes.
- Install the eSIM before departure:
- iPhone (XS and later): Settings → Mobile Data → Add eSIM → Use QR Code → scan the QR from your email.
- Samsung Galaxy (S21 and later, Z Fold/Flip): Settings → Connections → SIM Manager → Add eSIM.
- Google Pixel (3 and later): Settings → Network & Internet → SIMs → Add eSIM.
- Activate on landing: After landing at Suvarnabhumi or Don Mueang, turn on Data Roaming for the ThailandeSIM profile. It connects to TrueMove H or DTAC instantly.
⚠ Important: Install the eSIM QR code in Singapore, but only activate it after landing in Thailand. Activating from Singapore will cancel the plan immediately.
Tips for Singaporean travellers using a Thailand eSIM
- Keep your Singapore SIM active for banking and 2FA: Set your Singtel/StarHub/M1 SIM to flight mode and enable WiFi Calling. Your Singapore number remains reachable over Thai WiFi for bank OTPs, DBS/OCBC/UOB alerts, and calls — at no charge.
- M1 users — skip the Daily Passport: At SGD $25.65/week versus SGD $12 for the ThailandeSIM, you get 35 GB (ThailandeSIM) vs 21 GB (M1) for less money. The ThailandeSIM wins on both price and data.
- Set ThailandeSIM as default data line: iPhone: Settings → Mobile Data → Default Line. Android: Settings → SIM Manager → Preferred SIM for mobile data.
- School holidays and peak season: June and December are peak periods for Singaporean families visiting Thailand. Book your eSIM early — plans are available instantly online, so no last-minute queues at Changi Airport SIM kiosks.
- Popular eSIM-compatible phones in Singapore: iPhone 15, 14, 13 series; Samsung Galaxy S23/S24, Z Fold 5, Z Flip 5; Google Pixel 8; and most flagship devices available at Challenger, Courts, or mobile carrier stores. Budget Android phones below ~SGD $300 may not support eSIM.
Frequently asked questions
Can I use a Thailand eSIM on a phone from Singapore?
Yes, as long as your phone supports eSIM and is carrier-unlocked. Most flagship phones sold in Singapore — including iPhones from XS onward, Samsung Galaxy S21 and later, and Google Pixel 3 and later — support eSIM. Phones purchased through Singtel, StarHub, or M1 on a contract may be SIM-locked during the contract period. Check with your carrier or confirm in Settings → About.
Is a Thailand eSIM cheaper than Singtel or M1 roaming?
Yes. A ThailandeSIM costs USD $8.90 (~SGD $12) for 35 GB over 7 days. For the same week, Singtel’s ReadyRoam Neighbours packs cost SGD $25–$35 (for 5–7 GB), M1 Daily Passport costs SGD $25.65 (for 21 GB), and unlimited daily options from Singtel or StarHub cost SGD $133–$210. A ThailandeSIM is cheaper in virtually every scenario involving 3+ days of travel.
I’m only going for a 3-day weekend — is a Thailand eSIM still worth it?
Yes. The 7-day plan at SGD $12 is valid for 7 days from activation, but you only activate it when you land in Thailand — so a 3-day trip uses the first 3 days of validity. For 3 days, you get 35 GB for SGD $12, versus Singtel’s 3 GB for SGD $15 (3 × $5 packs) or M1’s 9 GB for SGD $13.85 ($2.95 × 3 + $5 activation). More data, slightly cheaper or comparable cost.
Do I still need my Singapore SIM in Thailand?
You don’t need it for data — the Thailand eSIM handles that. But it’s a good idea to keep your Singapore SIM active in your phone (in flight mode) for incoming calls and SMS. If your bank, government app (Singpass), or employer needs to reach your Singapore number, WiFi Calling over your hotel or Airbnb WiFi will handle that seamlessly.
Ready for your next Thailand trip from Singapore?
Get your Thailand eSIM set up before your Changi flight — instant delivery to your inbox, installs in minutes, and connects automatically when you land in Bangkok.