“Unlimited” Thailand eSIMs usually limit high-speed data, not the total connection. Airalo lists 3 GB per 24 hours before 1 Mbps; Nomad generally lists 2 GB/day before 1 or 2 Mbps, depending on the plan. This guide explains those limits, what reduced speeds mean, and when a fixed allowance is better value.
Did you know? What "throttled speed" actually means for your phone
Throttled speeds are listed in megabits per second (Mbps), but your phone measures downloads in megabytes (MB). There are 8 bits in a byte, so the actual download speed is 8× slower than the number suggests. Here's what that means in real life:
Download times at reduced speeds
| Throttled speed | Actual download rate | Time to download 1 photo (3 MB) | Time to load a web page (2 MB) |
|---|---|---|---|
| 128 Kbps | 16 KB/s | ~3 minutes | ~2 minutes |
| 512 Kbps | 64 KB/s | ~47 seconds | ~31 seconds |
| 1 Mbps | 125 KB/s | ~24 seconds | ~16 seconds |
| 2 Mbps | 250 KB/s | ~12 seconds | ~8 seconds |
For context: 128 Kbps is 0.128 Mbps; 2 Mbps is about 16 times faster. At 2 Mbps, the connection is usable for messaging, maps, and basic browsing, but painful for video calls and uploads. The throttled speed your provider drops you to determines whether "unlimited" still feels like internet.
What "unlimited" actually means
Most "unlimited" Thailand eSIMs work roughly like this:
- You get a high-speed allowance — usually a daily cap (1–5 GB/day) or a total cap that scales with the plan length (15–60 GB across the validity period).
- After the high-speed allowance, the plan’s reduced-speed policy applies. Check the stated speed and whether the allowance resets daily.
- Reset times vary by provider. Airalo uses 24-hour periods from activation; Saily resets its daily allowance at midnight in the eSIM’s local time zone. Check your plan’s reset time rather than assuming every provider resets at midnight.
The data itself doesn't cut off. You can technically still use the internet. That's the "unlimited" part. But the usable part, the high-speed data you actually need for maps, photos, and video calls, is very much limited.
There's another catch that trips people up: with most unlimited plans, you can't buy your way out of the throttle. Hit your daily cap at 11 AM? There's no top-up option, no "add more high-speed data" button. You're stuck at crawl speed until the next day. With a top-up-capable fixed plan, you can buy more data without waiting for a daily reset. Our 50 GB / ten-day pack cannot be topped up.
This is what providers call a Fair Usage Policy (FUP). It's standard across the industry, and it's not inherently dishonest; networks need to manage capacity. The problem is that the word "unlimited" is plastered across the marketing while the FUP is tucked away in a footnote.
What popular providers actually deliver
We went through the fine print of the major eSIM providers selling "unlimited" Thailand plans. Here's what we found:
Provider allowances and speed limits
| Provider | High-speed cap | Speed after cap | Disclosed upfront? |
|---|---|---|---|
| Nomad | 2 GB/day | 1 or 2 Mbps depending on the plan | Documented in plan details |
| Saily | 5 GB/day | ~1 Mbps (1024 Kbps) | 5 GB/day, then ~1 Mbps |
| Ubigi | 30-day plan: 60 GB total | 2 Mbps | 30-day terms: 60 GB, then 2 Mbps |
| Airalo | 3 GB/day | ~1 Mbps (1024 Kbps) | 3 GB/day, then ~1 Mbps |
| Holafly | Exact threshold not stated here | Check plan-specific terms | Confirm the fair-use rules before purchase |
| MicroEsim | Varies widely by plan tier | 124 Kbps to 5 Mbps (depending on tier) | Many sub-plans, hard to compare |
| Simify | Not specified | Won't drop below 1 Mbps; resets at midnight | Speed floor disclosed, threshold isn't |
Sources: each provider's published plan details and FUP documentation, checked September 2026. Nomad's 2 GB/day cap is documented in their plan detail page and confirmed in their unlimited eSIM blog post. Ubigi's tiered FUP is documented on their Thailand unlimited product page.
Ubigi’s 30-day plan includes 60 GB before reduced speeds of 2 Mbps. Nomad generally includes 2 GB/day, then 1 or 2 Mbps depending on the plan. Airalo’s standard policy is 3 GB per 24 hours, then 1 Mbps unless the package states otherwise; Saily lists 5 GB/day, then about 1 Mbps. Holafly’s fair-use terms do not establish a numeric high-speed threshold here. Compare the allowance and reset rule for the plan you choose. See Travelsim Asia vs Airalo 2026 comparison.
Three checks before buying unlimited
- Compare the usable high-speed allowance, not just the package price. A low price can be good value if the allowance covers your daily use; it does not by itself tell you how fast the plan will be.
- Read the fair-use terms. They describe when speed reductions or other limits can apply; the presence of a policy does not mean every traveler will be throttled.
- Check what happens if you need more high-speed data. Some plans let you add data; others require waiting for a reset or buying another plan. Read the options before you need them.
What throttled speed actually feels like in Thailand
Lower speeds mainly mean longer waits for large files and less room for video. These examples describe the practical tradeoff; reception and congestion also affect the connection.
128 Kbps
A 10 MB download takes about ten minutes at 128 Kbps before overhead. Text messages need much less data, but photos, video and large map downloads will be slow.
512 Kbps
At 512 Kbps, a 10 MB download takes about 2 minutes 36 seconds before overhead. Messaging and light browsing are more realistic uses than large uploads or video calls.
1 Mbps
At 1 Mbps, a 10 MB download takes about 80 seconds before overhead. Messaging, maps and light browsing can work; video quality and upload times depend on the app and connection.
2 Mbps
At 2 Mbps, a 10 MB download takes about 40 seconds before overhead. It gives you more room for browsing and lower-resolution video than 1 Mbps, but large files still take time.
For the plans compared here, Airalo and Saily list about 1 Mbps after their high-speed allowance, Nomad lists 1 or 2 Mbps depending on the plan, and Ubigi lists 2 Mbps. The 128 and 512 Kbps examples above are slower reference points for comparison. Compare both the allowance and the reduced speed with what you expect to do.
Why is my Holafly or Nomad eSIM so slow in Thailand?
If your eSIM slows down in Thailand, check your data usage against the plan’s high-speed allowance and its reset rule first. A fair-use reduction is one possible cause; weak reception, congestion or a connection issue can also slow things down. If your usage does not explain the slowdown, contact the provider rather than assuming you have hit a cap.
- Nomad Thailand unlimited: generally 2 GB/day at high speed, then 1 or 2 Mbps depending on the plan. Check the package details if you expect heavy daily use.
- Saily Thailand unlimited: 5 GB/day before throttling. The cap is more generous than Nomad's, and after it Saily throttles to about 1 Mbps — fine for maps and messaging, slow for video calls and uploads.
- Holafly Thailand: check the plan-specific fair-use terms before buying. This comparison does not establish an exact high-speed allowance, reduced speed or reset time.
- Airalo Thailand unlimited: the standard policy is 3 GB per 24 hours, then 1 Mbps unless the package states otherwise. Saily lists a larger 5 GB/day high-speed allowance, then about 1 Mbps.
- Ubigi Thailand unlimited: the 30-day plan costs $49, includes 60 GB at full speed and then runs at 2 Mbps for the remainder of the plan. The allowance does not reset daily. Check shorter plans separately.
If you have used the day’s high-speed allowance, use WiFi, wait for your plan’s reset, or switch to another data plan. A whole-plan fair-use limit may not reset before the plan expires. This is why we sell fixed data plans with no daily allowance throttle. If you run low, you can top up through your personal web portal.
Our 10 GB Thailand plan has no daily cap or allowance-based speed reduction. Buy online, receive the eSIM by email and follow the activation instructions to connect.
When does the throttle actually kick in?
2–3 GB per day sounds like plenty until you look at what eats through it:
What uses your daily allowance
| Activity | Approx. data used |
|---|---|
| Google Maps navigation (1 hour) | ~10–20 MB |
| WhatsApp messaging (all day, text + some images) | ~50–150 MB |
| Video-heavy social scrolling (30 minutes) | ~250–500 MB |
| Uploading 20 photos to social media | ~200–500 MB |
| Video call (30 minutes) | ~300–700 MB |
| Netflix/YouTube (1 hour, HD) | ~1.5–3 GB |
| Hotspotting to a laptop (1 hour, normal use) | ~500 MB–1 GB |
A single video call plus some Instagram browsing and photo uploads can push you past 2 GB before lunch, well past Nomad's 2 GB daily cap. Saily's 5 GB/day is harder to blow through casually, and Ubigi's plan-length-based caps are the most forgiving. Not sure how much data you actually need for your trip? We break it down by usage type in our Thailand eSIM data usage guide.
The worst-case scenario
It is 2 PM and you have used the daily high-speed allowance uploading temple photos. Your connection continues at the plan’s reduced speed: messages and navigation may still work, while another large upload or a video call can take longer. Check when the allowance resets; a whole-plan allowance does not necessarily renew the next day.
The math: unlimited vs fixed
Here's a typical "unlimited" plan next to a fixed data plan for a 7-day Thailand trip.
"Unlimited" plan (typical)
- 2–5 GB/day at full speed
- After the high-speed allowance, the plan’s reduced-speed policy applies. Check the stated speed and whether the allowance resets daily.
- 7 days = 14–35 GB usable at speed
- Typically $15–$30 for 7 days
- Throttled hours = frustrating hours
Fixed plan (e.g. 5 GB / 30 days)
- 5 GB at full speed, all day, every day
- No daily allowance throttle
- Use it when you need it, not on a daily clock
- Typically $8–$12
- Top up if you need more
At 500 MB to 1.5 GB a day, a week uses 3.5–10.5 GB. A 5 GB plan suits the lighter end; choose more if you expect regular video, uploads or hotspotting.
Why we don't sell unlimited plans
We could. Plenty of providers do. But we'd rather sell you a plan that does what it says.
When you buy a 5 GB plan from Travelsim Asia, you get a 5 GB allowance with no daily cap or allowance-based speed reduction. Use more on one day and less on another. Actual connection speeds depend on the local network and reception.
- No daily allowance throttle — use the allowance when you need it.
- Top up if you need more through a web portal, without login, except on our 50 GB / ten-day pack.
- No app, no account — buy on the website, eSIM arrives by email.
- What you see is what you get — the plan says 5 GB, you get 5 GB.
When unlimited does make sense
We're not here to say unlimited is always bad. It can work well in specific situations:
- You genuinely don't want to think about data at all — and you're okay with slow speeds in the evening if you used a lot in the morning.
- You consistently stay under 2 GB/day — in which case you'll rarely hit the throttle, and unlimited gives you peace of mind.
- You want a generous, transparent FUP and you're willing to pay for it — Ubigi's 30-day plan gives you 60 GB before throttling to 2 Mbps. That's the closest thing to "real" unlimited in this market, and the 30-day package costs $49. Compare its 60 GB full-speed allowance with the fixed data you would otherwise buy.
- You're on a very long trip — and the psychological comfort of "unlimited" outweighs the cost difference. Planning a month-long stay specifically? See our best eSIM for Thailand 1 month guide for plan recommendations tailored to 30-day trips.
Unlimited plans aren't a scam. But the word "unlimited" sets an expectation the product doesn't fully deliver. If you go in with eyes open and understand the daily cap, it can be a reasonable choice. If you're expecting full-speed internet all day every day, you'll be disappointed.
What to check before buying any Thailand eSIM
Whether you go unlimited or fixed, here's what to look for. If you'd rather skip straight to a ranked shortlist, see our best eSIM for Thailand guide.
- Look for "Fair Usage Policy" or "FUP" — check whether the high-speed allowance is daily or applies across the plan. Read what happens after you use it.
- Check the reduced speed as well as the high-speed allowance. Messaging and navigation can still work at reduced speeds, while video and uploads need more capacity. Ubigi lists 2 Mbps after its 30-day plan’s 60 GB allowance.
- Check whether the cap is daily or per-plan — a 5 GB/day cap resets every midnight. A 60 GB/30-day cap doesn't reset within the plan, but it's more forgiving for travelers with uneven usage patterns.
- Check hotspot restrictions — some "unlimited" plans cap hotspot usage separately.
- Compare the actual cost per usable GB — an unlimited plan with a 2 GB daily cap gives you 14 GB of usable speed per week. Compare that to the cost of a 10 GB fixed plan.
- Check if the provider discloses terms upfront — if you have to dig through a FAQ to find the FUP, that tells you something about how they market their product.
- Ask: can I top up if I hit the cap? — most unlimited plans don't let you buy extra high-speed data mid-day. Fixed plans almost always allow top-ups on demand.
The verdict
Are unlimited Thailand eSIMs a scam? No. The data is real, the connection works, and some providers (Nomad and Ubigi) are transparent about how it all functions. Nobody is stealing your money.
For maps, messaging and moderate social media, we recommend choosing a fixed allowance that fits your trip. You know how much data you have and can use it without a daily allowance throttle. Unlimited is worth considering for heavier phone use when its high-speed allowance fits your day; check the hotspot limit separately if you plan to work on a laptop.
Thailand eSIM plans
Thailand eSIM — no daily allowance throttle, no fine print. Plans from $1.99.
Need help choosing? Our support team is available 24/7 via email and live chat. Typical response time: under 1 hour. Already purchased? Follow our Thailand eSIM installation guide to get set up in minutes.
Dig deeper
Need more detail on a specific topic? We've covered the Thailand eSIM decision from every angle:
- Best eSIM for Thailand (2026) — full comparison of Airalo, Holafly, Nomad, Saily, Ubigi, and Travelsim Asia on coverage, throttling, and setup.
- Best eSIM for Thailand — 1 Month Stay — dedicated guide for travelers planning 30-day trips, focused on the best value plans for monthly usage patterns.
- Thailand eSIM Prices 2026 — every major provider's plans and prices side by side, with validity windows and hidden trade-offs explained.
- How to Install a Thailand eSIM — step-by-step setup for iPhone and Android, activation at Suvarnabhumi and Don Mueang, and troubleshooting.
- Cheapest Thailand eSIM 2026, the lowest price at every plan size, per gigabyte, and by trip length.