When you buy a travel eSIM, you usually choose between a plan with a set number of gigabytes and an “unlimited” plan that costs more. If you mostly use maps, messaging and browsing, a fixed plan with some spare data is often the cheaper choice. Unlimited is worth it when you stream, share a hotspot or work online, as long as you know how much high-speed data the plan gives you each day. This guide compares Unlimited vs Fixed data plan options: how each one works, where “unlimited” plans are limited, how to estimate your data and what a 15-day trip costs to help you choose the right plan.
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A fixed data plan gives you a set amount of data for the entire validity period, while an unlimited plan lets you continue using data but may reduce your speed after a daily high-speed allowance.
Here is how they compare:
For a closer look at how unlimited plans work, see our guide to to what an unlimited eSIM is.
A daily data plan gives you a set amount of data each day, which resets according to the plan’s schedule. It suits travelers whose data usage is fairly consistent and who can stay within the daily allowance.
Unlike a fixed (Total) plan, a daily plan generally does not let you carry unused data forward to a busier day. If you exceed the daily limit, your connection may stop or slow down, depending on the plan.
For example, Gigago’s Japan eSIM Daily plans stop providing data when you reach the daily limit. The allowance resets at 23:59 GMT+8, not at midnight in Japan. If you expect to use much more data on certain days, check the daily allowance and reset time before choosing this plan type.
When you reach your data limit, your connection may stop or slow down, depending on the plan’s rules. Some plans also support top-ups, but this option is not available for every eSIM.
| Plan type | What happens at the limit | Gigago example |
|---|---|---|
| Fixed (Total) | The connection may stop or the speed may drop sharply, depending on the plan | China Total plans drop to 128 kbps |
| Daily | The connection may stop until the next day or reset | Japan Daily and Vietnam Viettel daily plans |
| Unlimited with a daily allowance | Speeds are reduced for the rest of the daily period | Europe and Singapore drop to 5 Mbps after 1GB of high-speed data |
Most Gigago plans do not support top-ups, so if you run out of usable data, you may need to purchase and install another eSIM. Some Vietnam and Thailand plans offer top-ups, but they are exceptions.
If you need to install a new eSIM after running out of data, connect to Wi-Fi first. You will need an internet connection to complete the setup.
An unlimited travel eSIM may offer unlimited data usage without providing unlimited high-speed data. Many plans reduce your speed after you use a daily high-speed allowance, while others maintain a fixed speed or have no daily high-speed cutoff.
Gigago’s Unlimited plans vary by destination:
| Speed conditions | Gigago examples |
|---|---|
| 5 Mbps after 1GB of high-speed data per day | Most Unlimited plans for Europe, Singapore and China |
| 10 Mbps after 1GB of high-speed data per day | Malaysia and Australia Unlimited plans |
| No daily 1GB high-speed cutoff, but other speed conditions may apply | Thailand eSIM‘s Unlimited Max offers high-speed data, while Unlimited Lite runs at a steady 10 Mbps. Vietnam Unlimited has no fair usage limit according to current product information. |
Check the speed conditions before buying, not just the word “unlimited.” The daily high-speed allowance, reduced speed and any fair usage policy can make a significant difference to your experience.
Learn more in our guides to fair usage policies and mobile data throttling to understand how these restrictions work.
A reduced speed of 5–10 Mbps is generally enough for everyday tasks on one device, but 128 kbps is much more restrictive. Your experience will also depend on signal strength, network congestion and the apps you use.
| Activity | Recommended speed | Source |
| Netflix in Full HD (1080p) | 5 Mbps | Netflix Help Center |
| YouTube in 720p | 2.5 Mbps | YouTube Help |
| Zoom video call in 720p | 1.2 Mbps | Zoom Support |
| Zoom audio-only call | 60–80 kbps | Zoom Support |
Going by these figures, at 5 Mbps, you can generally use maps, messaging and video calls, or stream video on one device.
At 10 Mbps, you have more room for additional activity or another device, although hotspot performance varies.
At 128 kbps, basic text messages may still work, but browsing image-heavy pages and streaming video can become frustratingly slow.
Before choosing an unlimited plan, check whether its reduced speed will support your everyday travel needs. A plan can provide unlimited data but still feel restrictive if its post-allowance speed is too slow for your activities.
Your recent mobile data usage is the best starting point for estimating how much data you need on a trip. Use these steps to calculate a baseline:
Your travel habits can make a significant difference. For example, one traveler may use only a few gigabytes over a 10-day trip by mainly using maps and messaging, while someone who streams video, uploads media or works online may use considerably more.
Treat your calculation as a baseline, not a strict limit. Leave some extra data for unexpected needs, especially if you plan to rely on mobile internet throughout the day.
A fixed data plan may cost less while providing more high-speed data, whereas an unlimited plan may offer better value if you need more data than a fixed allowance provides. The best option depends on both the price and the speed conditions after any daily limit.
The following comparison uses the Gigago prices and plan conditions provided for October 2026.
| Gigago’s Europe eSIM plan | Price for 15 days | Data conditions |
|---|---|---|
| Unlimited | $51.50 | 1GB high-speed data per day, then 5 Mbps |
| 20GB Total | $31.00 | 20GB total allowance |
| 10GB Total | $17.50 | 10GB total allowance |
| 1GB Daily | $23.50 | 1GB per day |
For this example, the 20GB Total plan costs $20.50 less than the Unlimited plan. It may be a better choice if 20GB is enough for your trip. However, the Unlimited plan lets you continue using data at 5 Mbps after the daily high-speed allowance, while a fixed plan’s behavior after its total allowance runs out depends on its terms.
However, the comparison changes when an unlimited plan has no daily high-speed cutoff. At the time of writing, 15 days of Thailand Unlimited Lite cost $24.90, while 15 days of Vietnam Unlimited cost $20.90. Both plans offered their stated unlimited-data conditions without the 1GB-per-day cutoff described above.
Note: Prices and product conditions can change. Check the relevant Gigago product page for current prices and plan details before purchasing.
Choose a fixed plan if your estimated data usage fits within its allowance; choose an unlimited plan if you need to keep using data without worrying about a total data cap. If you choose unlimited, check the reduced speed and daily high-speed allowance first.
Remember to check the hotspot terms before you buy, because not every unlimited plan allows it. If you plan to connect a laptop, read how much data a hotspot uses first, as laptop updates and cloud syncing can use much more data than a phone.
Use this quick comparison to narrow down your options.
| Your trip | Plan type to consider |
| Short city break, mostly maps and messaging | Fixed plan with some headroom |
| Two weeks, moderate social media, hotel Wi-Fi | Fixed plan in the 10–20GB range |
| Steady daily use with no heavy days | Daily plan |
| Streaming most days or working online | Unlimited plan, ideally with no daily allowance |
| Sharing data with family or a laptop | Unlimited or a large fixed plan, with hotspot allowed |
Note: On plans with a daily high-speed data limit, automatic photo backups and app updates can use up your allowance quickly. Turn them off on mobile data or enable Low Data Mode. See Gigago’s guide to saving data on iPhone for setup instructions.
When you know which type fits your needs, compare eSIM plans for your destination on Gigago and read the terms on the plan page before you buy.
Check the high-speed allowance, reduced speed, reset time, hotspot rules, data-limit behaviour, validity and coverage before paying.
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