Thailand is Malaysia’s closest international neighbour — and by far the most visited. Whether you’re making a quick weekend drive to Hat Yai, flying into Phuket for a beach holiday, or taking the family to Bangkok, Malaysians cross the border in massive numbers. In 2025, Malaysia became Thailand’s single largest source market with 4.52 million arrivals — overtaking China for the first time [Bernama, 2026].
With so many Malaysians visiting Thailand regularly — often multiple times a year — getting mobile data right is worth thinking about. This guide compares what CelcomDigi and Maxis charge for roaming in Thailand versus a dedicated Thailand eSIM, flags a few important local considerations, and shows you how to set up before your trip.
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Why use a Thailand eSIM instead of CelcomDigi or Maxis roaming?
A Thailand eSIM is a digital SIM you install on your phone before departure. It connects automatically to Thailand’s 5G networks — AIS or True/dtac — the moment you land or cross the border, giving you fast, affordable data without touching your Malaysian carrier’s roaming settings.
For Malaysian travellers, the case is particularly compelling:
- Keep your Malaysian number active: Dual-SIM phones let you keep your CelcomDigi or Maxis SIM in your phone alongside the Thailand eSIM — your Malaysian number stays reachable for calls, banking OTPs, and WhatsApp.
- More data for less: 35 GB for 7 days at USD $8.90 (~RM40) — compared to RM49–RM58 from Malaysian carriers for the same week with less usable data.
- No coverage restrictions: CelcomDigi roaming is unavailable in parts of southern Thailand (Pattani, Yala, Narathiwat). A ThailandeSIM runs on AIS/TrueMove H with no such geographic restrictions.
- Great for frequent travellers: If you visit Thailand 3–4 times a year, buying a fresh eSIM each time is faster and cheaper than managing roaming passes on your carrier app.
- 5G coverage across Thailand: AIS and TrueMove H cover Bangkok, Phuket, Pattaya, Koh Samui, Chiang Mai, Hat Yai and all major tourist areas at 4G/5G speeds.
eSIM vs CelcomDigi vs Maxis – roaming price comparison for Thailand
Here’s a clear comparison of the main roaming options for a 7-day trip to Thailand:
| Provider | Plan / pass | Data | Cost (7 days) | Source |
|---|---|---|---|---|
| Thailand eSIM | 7-day plan | 35 GB high-speed | USD $8.90 (~RM40) | thailandesim.com, Jun 2026 |
| CelcomDigi 7-Day Unlimited Pass | 7-day unlimited | 3 GB/day high-speed, then 1 Mbps* | RM58 | help.celcomdigi.com, May 2026 |
| CelcomDigi 3-Day Pass | 3-day data pack | 4 GB total + 15 min calls | RM28 (3 days only) | help.celcomdigi.com, May 2026 |
| CelcomDigi Daily Pass (no pass active) | Auto daily fallback | 2 GB/day | RM39/day = RM273 / 7 days | help.celcomdigi.com, May 2026 |
| Maxis 7-Day ASEAN Pass | 7-day ASEAN roaming | Included data (fair use) | RM49 | maxis.com.my, Jun 2026 |
| Maxis Single Day Roaming | Daily roaming | Data (fair use) | RM29/day = RM203 / 7 days | maxis.com.my, Jun 2026 |
* CelcomDigi 7-Day Unlimited Pass provides 3 GB/day of high-speed data; after the daily quota is used, speed reduces to 1 Mbps (postpaid) or 512 kbps (prepaid). Daily Pass (RM39/day) is auto-activated if no pass is purchased — avoid this by pre-booking a pass. USD/MYR rate: ~4.47, June 2026.
At first glance, Maxis’ RM49 7-day ASEAN Pass looks competitive — but a ThailandeSIM at ~RM40 is cheaper AND gives you 35 GB of dedicated high-speed data with no throttling after a daily cap.
The CelcomDigi 7-Day Unlimited Pass at RM58 is the most popular option for CD subscribers, but at RM18 more than the ThailandeSIM, with a daily cap of only 3 GB before throttling.
Bottom line: A ThailandeSIM at ~RM40 (USD $8.90) is cheaper than both Maxis and CelcomDigi's 7-day passes — and delivers more data at full speed with no geographic restrictions in Thailand.
⚠ CelcomDigi restriction in southern Thailand: CelcomDigi roaming is not available in Pattani, Yala (including Betong), Narathiwat, and border areas near the Thai-Cambodia border [CelcomDigi Help, May 2026]. If you're crossing into southern Thailand from Kelantan, Perlis, or Kedah — including popular destinations like Hatyai — CelcomDigi may not work. A ThailandeSIM on AIS/TrueMove H has no such restrictions.
How to get a Thailand eSIM from Malaysia – step by step
The whole process takes under 5 minutes and works best done at home in KL, Penang, JB, or wherever you’re departing from — before you drive or fly to Thailand:
- Choose your plan by trip length:
- Weekend or 3–7 day trip: 35 GB / 7-day plan at USD $8.90 (~RM40) — the go-to option for most Malaysian visitors to Hat Yai, Phuket, or Bangkok.
- 1–2 week holiday: Unlimited / 15-day plan at USD $24.90 (~RM111) — ideal for extended beach trips or family holidays.
- Frequent travellers: The 30-day Unlimited at USD $44.90 (~RM201) can be activated fresh on each trip within 30 days of your QR code date.
- Purchase online: Buy at ThailandeSIM.com — pay by card in USD (Maybank, CIMB, and most Malaysian Visa/Mastercard cards accepted). QR code arrives in your email in 5–10 minutes.
- Install the eSIM on your phone:
- iPhone (XS and later): Settings → Mobile Data → Add eSIM → Use QR Code → scan from 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 after entering Thailand: Once you’ve crossed the border or landed at your Thai airport, go to Settings and turn on Data Roaming for the ThailandeSIM profile. It connects to AIS or TrueMove H instantly.
⚠ Important: Install the eSIM in Malaysia before you leave, but only activate it after you have entered Thailand. Activating from Malaysia will cancel the plan.
Tips for Malaysian travellers using a Thailand eSIM
- Keep your Malaysian SIM for calls and banking: Set your CelcomDigi or Maxis SIM to flight mode or turn off data roaming. Your Malaysian number stays reachable via WiFi Calling (if your plan supports it) for MAE, Touch ‘n Go eWallet OTPs, and calls home.
- eSIM compatibility — check before you buy: eSIM is supported on flagship phones, but many mid-range phones popular in Malaysia (Oppo Reno series, Xiaomi Redmi, Vivo) do not support eSIM. Before purchasing, confirm your phone supports eSIM in Settings → About → SIM Status, or check the ThailandeSIM compatibility tool.
- Hat Yai and southern Thailand travellers: If you’re crossing into Hat Yai (Songkhla), Sadao, or Ban Prakob from northern Malaysia — CelcomDigi roaming may be restricted. A ThailandeSIM on AIS/TrueMove H covers these areas without issue.
- Set ThailandeSIM as your default data line: iPhone: Settings → Mobile Data → Default Line. Android: Settings → SIM Manager → Preferred SIM for mobile data.
- Hotlink users: Hotlink is Maxis’ prepaid brand — the Maxis ASEAN roaming pass is available for Hotlink prepaid subscribers too. However, the ThailandeSIM is still cheaper per GB and has no daily data throttling.
Frequently asked questions
Does my Malaysian phone support eSIM for Thailand?
eSIM support depends on your phone model. Phones that support eSIM and are commonly used in Malaysia include iPhone XS and later, Samsung Galaxy S21 and later, Galaxy Z Fold 3+ and Z Flip 3+, and Google Pixel 3 and later. Many popular mid-range phones in Malaysia — including Oppo, Xiaomi Redmi, and Vivo budget models — do not support eSIM. Check your phone’s Settings → About to confirm before purchasing.
Is a Thailand eSIM cheaper than CelcomDigi or Maxis roaming?
Yes. For a 7-day trip, CelcomDigi’s 7-Day Unlimited Pass costs RM58 and Maxis’ 7-Day ASEAN Pass costs RM49. A ThailandeSIM costs just ~RM40 (USD $8.90) for 35 GB of full-speed data — no daily throttle. It’s also the only option that works in southern Thailand areas where CelcomDigi roaming is restricted.
I’m driving to Hat Yai — will CelcomDigi roaming work?
CelcomDigi roaming is not available in Pattani, Yala (including Betong), and Narathiwat districts, per their official documentation. Hat Yai itself is in Songkhla district and is generally fine — but areas close to the Kelantan and Perlis borders may be affected. If you are crossing at Rantau Panjang–Sungai Golok or Padang Besar–Hat Yai, a ThailandeSIM on AIS is the safer choice.
Can I use a Thailand eSIM on a Hotlink (Maxis prepaid) phone?
eSIM compatibility is about the phone hardware, not the carrier. If your phone supports eSIM, you can run a Hotlink SIM in slot 1 and install the Thailand eSIM digitally — both work simultaneously on dual-SIM devices. This way you keep your Hotlink number for incoming Malaysian calls and use the ThailandeSIM for data in Thailand.
Ready for your Thailand trip from Malaysia?
Get your Thailand eSIM sorted before you cross the border or board your flight. Instant delivery to your email, installs in minutes, and activates the moment you enter Thailand.