Disclaimer: The prices and information presented on this page reflect a snapshot at the time of research and may change at any time without prior notice.
Aisha
07 March 2026
Thailand is consistently one of the most popular destinations for Singaporeans, whether you are heading to Bangkok for a long weekend, unwinding on the beaches of Koh Samui, or exploring Chiang Mai's temples at your own pace. And if you are on SIMBA, the good news is that Thailand is included in the roaming coverage. But SIMBA Thailand roaming works in layers, and understanding those layers before you fly matters more than most travellers realise. The difference between Main Data, APAC roaming and Group A allocations, combined with SIMBA's pay-per-use wallet drain risk, means a bit of homework before you pack saves you a lot of confusion at the airport.
SIMBA, formerly known as TPG Singapore, includes international roaming in all of its mobile plans. Thailand is a well-covered destination under SIMBA's zone structure, and it sits within both the APAC Roaming zone and the Group A countries list. For most SIMBA SuperRoam plan subscribers, this means Thailand is treated as part of your Main Data zone, which is a meaningful advantage: you can use your standard local data allowance while in Bangkok or Phuket without dipping into a separate roaming bucket at all.
The exception is the entry-level SuperRoam 10 plan. Users on this plan do not get Thailand in the Main Data zone, so roaming data there draws from the Group A allowance instead. Once that runs out, usage is charged at SGD 4.00 per GB in 10MB blocks. There is no automatic cap or alert built into this, which is the core of what SIMBA users call the wallet drain risk. Without monitoring your usage actively in the My SIMBA App, you can hit significant charges before realising the APAC bundle was exhausted.
For postpaid SIMBA users, the same zone logic applies. Thailand falls under the APAC and Group A categories depending on which postpaid plan you hold. Higher-tier plans come with more generous roaming data allocations across both zones, making Thailand a genuinely low-friction destination. For any destination beyond the covered zones or after you exhaust your allowance, SIMBA charges from SGD 8.00 per GB at pay-per-use rates for non-Group-A countries, though Thailand itself sits within the lower-cost SGD 4.00/GB tier.
The table below summarises how Thailand fits into SIMBA's current SuperRoam prepaid plan tiers. For exact current prices, always verify on the SIMBA website or My SIMBA App, as plan details are updated periodically.
Data usage in Thailand follows the deduction sequence: Main Data zone first, then APAC roaming, then Group A allocation. Once all roaming allowances are exhausted, the pay-per-use rate of SGD 4.00/GB kicks in automatically. SIMBA does not send an alert when this transition happens, which is worth keeping front of mind.
Check your SIM's roaming readiness before departure. SIMBA recommends having your SIM active in your device for at least 48 hours before flying. To check roaming readiness, send an SMS with the word SIMBA to 1218. This free service confirms whether your SIM is roaming-enabled and shows your current balance.
Enable data roaming in your device settings. SIMBA SIM cards are roam-ready by default, but your phone's data roaming toggle still needs to be switched on manually. Thailand uses APN settings that should auto-configure on a SIMBA plan, but if you have connection issues on arrival, check your APN settings in your phone's mobile network menu.
Monitor usage actively in the My SIMBA App. Because SIMBA does not send low-data alerts when your roaming allowance is nearly exhausted, the app is your only real-time view of how much Group A or APAC data remains. Check it daily during a Thailand trip, especially if you use maps and social media frequently.
Consider topping up your SIMBA Wallet before departure. If your Group A allowance runs out and pay-per-use kicks in, charges are deducted directly from your SIMBA Wallet at SGD 4.00/GB. A wallet with sufficient credit ensures continuity without interruption. Without credit, data access stops.
Thailand requires 4G/5G-compatible devices on supported bands. SIMBA's network runs on LTE Bands 8 and 40. Most modern smartphones support these, but if you are using an older or region-specific device, confirm compatibility before your trip.
SIMBA Thailand roaming works well for shorter trips on higher-tier plans where Thailand falls within Main Data zone coverage. If you are on SuperRoam 12 or above and staying for a week or less with moderate data usage, the plan inclusion means no extra cost at all. That is a genuine advantage.
The picture changes for heavier users or longer stays. Thailand has fast 4G networks and you will likely use more data than expected: maps for tuk-tuk routes, translation apps in local markets, photos uploading to cloud storage from the islands. Once your Group A allocation is gone, SGD 4.00/GB adds up quickly. And if you are on SuperRoam 10, you only start with 1GB before the meter runs.
A TurkSIM eSIM for Thailand connects you to local networks including AIS and DTAC at flat prepaid rates with no zone system and no wallet drain. Your SIMBA SIM stays in place for your Singapore number, and the eSIM handles data. For a two-week trip or any trip where data is a priority, this gives you full control over costs before you board.
Thailand is a data-hungry destination. You are constantly pulling up Google Maps to navigate Bangkok's expressways, using Grab for rides, streaming Spotify on the beach, and sharing photos in real time. The SIMBA zone system handles light usage fine, but Thailand's appeal is exactly the kind of always-on connectivity that eats through a 1GB or 2GB Group A allowance faster than expected.
The wallet drain issue is the most-cited pain point among SIMBA users. Because SIMBA charges at SGD 4.00/GB in 10MB blocks from your SIMBA Wallet without sending an alert, you can return from a week in Koh Samui to find a bill you did not anticipate. TurkSIM eliminates this entirely. You pay for a set amount of data before you fly, that data runs on AIS or DTAC networks inside Thailand, and when it runs out, nothing more is charged. Your SIMBA SIM stays live for your Singapore number and banking OTPs, so there is no trade-off on reachability.
Before choosing this setup, it helps to check whether your device is listed among eSIM Compatible Phones and to review How to install an eSIM so the installation process is clear before departure.
For Singaporeans on the SuperRoam 10 plan in particular, or anyone planning more than a week in Thailand, the eSIM route is the more cost-predictable choice by a clear margin.
Yes. Thailand is covered under SIMBA's APAC roaming zone and Group A countries list. Most SuperRoam plans also include Thailand in the Main Data zone, meaning you can use your regular data allowance there at no extra charge. The exception is SuperRoam 10, where Thailand sits in Group A only.
Once your Group A or APAC roaming data is exhausted, SIMBA charges SGD 4.00 per GB in 10MB blocks. This is deducted directly from your SIMBA Wallet. There is no automated alert when the transition from included data to pay-per-use occurs, so active monitoring via the My SIMBA App is essential.
No. SIMBA does not send automatic alerts when your included roaming data is nearly exhausted. Usage transitions silently to pay-per-use rates at SGD 4.00/GB. Checking your balance regularly via the My SIMBA App or by SMS to 1218 is the best way to stay on top of costs.
SIMBA SIM cards are roam-ready by default, so you do not need to activate a separate roaming add-on. However, data roaming must be enabled in your phone's settings, and your SIMBA SIM should have been in your device for at least 48 hours before departure for the roaming parameters to update correctly.
SIMBA operates via partner network agreements in Thailand. For the latest preferred network names in Thailand, check the SIMBA roaming page at simba.sg/roaming, as partner agreements can change. If connection issues arise, manually selecting a network in your phone settings may help.
Yes. Dual-SIM smartphones support one physical SIM and one eSIM simultaneously. Your SIMBA SIM handles your Singapore number for calls and SMS, while the TurkSIM eSIM connects to local Thai networks for data. This is the most cost-effective setup for data-heavy trips to Thailand.
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