Unlimited eSIMs: which plans are really unlimited?

Is any travel eSIM truly unlimited?

Unlimited data does not automatically mean unlimited high-speed data. Among the offers we reviewed, we could not establish a provider-wide promise of unrestricted high-speed use for every destination and package. Many plans keep you online after a daily or monthly allowance, but at a substantially lower speed. Other providers leave the threshold to their network partners.

That does not prove that every individual plan is throttled. It means that the Unlimited label alone is not enough to judge a plan. For a useful comparison, you need four things: the high-speed allowance, the speed afterwards, the reset time and the hotspot rules.

Our starting point was Airalo: the official default policy reduces speed to 1 Mbps after more than 3 GB within 24 hours. The allowance resets every 24 hours from activation, rather than necessarily at midnight. Individual package terms can differ.

Three different meanings of Unlimited

Unlimited volume with a daily high-speed quota: you can keep transferring data, but only the first few gigabytes in each daily window are fast. Unused high-speed data normally cannot be treated as a freely available allowance for another day unless the package explicitly permits this.

Unlimited volume with a cycle allowance: the high-speed budget covers the whole package or billing cycle. If you use it early, the reduced speed can apply for the remainder of that cycle. Ubigi’s Europe monthly example belongs here.

Unlimited with network-managed fair use: no universal threshold is published, but local operators can still reduce speed. Missing figures make the product harder to plan around; they are not evidence of unlimited full-speed access.

What can you still do at 1 Mbps?

A connection capped at 1 Mbps is still useful for text messages, light browsing and small transfers when the network responds well. Large downloads, cloud backups and video are much more constrained. At 128 or 512 kbps, even image-heavy websites can take noticeably longer. These are practical expectations, not guaranteed performance tests.

The scale is easier to see with a download: 1 GB takes at least about 2 hours 13 minutes at a constant 1 Mbps, or about 17 hours 22 minutes at 128 kbps. This theoretical calculation uses decimal units and excludes overhead, interruptions and congestion. Actual downloads take longer.

How to choose a plan that fits your trip

1. Check the exact destination and package, not just the provider’s general advertising. Screenshot or save the conditions shown before purchase.
2. Compare high-speed data per day with your busiest day. A daily 3 GB quota is not the same as a flexible 21 GB allowance for a week.
3. Check the reduced speed and reset clock. Midnight, 24 hours after activation and the next billing cycle are different rules.
4. Check tethering separately. An unlimited phone allowance does not automatically mean unlimited hotspot data or permission to replace home broadband.
5. For large transfers or remote work, compare a fixed high-speed package and local operator offers too. A clear allowance can be easier to plan around than an unspecified FUP.

How we researched this comparison

We audited all 23 providers in our catalogue on 17 October 2026, including inactive and draft providers. Nineteen have documented Unlimited offers or daily packages with continued reduced-speed access. Inclusion in this article does not mean every offer is currently available in our comparison. Roamless, for example, announced Unlimited shortly before this review.

The evidence comes from official product pages, help centres, terms and provider-supplied catalogues. Catalogue-only findings are labelled explicitly. We do not turn a country example into a universal provider rule, and we do not treat missing information as a promise of no throttling. Conflicting product generations, such as Maya’s, remain identified rather than combined into a made-up limit.

For GoMoWorld, GlobaleSIM and Roamix, we did not establish a concrete current Unlimited travel-data offer with verifiable terms. Instabridge’s reviewed travel catalogue contains fixed-data packages; unlimited calling in a domestic mobile product is a different claim. These four therefore do not appear in the policy table. Firsty Free is also excluded from the Unlimited classification.

This is a review of published conditions, not a network speed test. Fair-use terms can change, and the conditions for your selected package at checkout take precedence. Our comparison may contain affiliate links; that does not change the limits recorded here.

Our assessment

Choose Unlimited for continued connectivity, not simply for the word on the label. Transparent limits make a plan easier to assess. If you need sustained high-speed data, only a package that explicitly documents the relevant allowance, hotspot rules and any restrictions can answer that need. None of the provider-wide claims reviewed here is sufficient on its own.