What "Unlimited" Actually Means on an eSIM Plan

Almost no unlimited mobile plan is unmetered. The standard arrangement is a generous allowance at full speed, after which the connection is slowed — often dramatically — for the rest of the period. You are never cut off, which is what lets the word stand.

That is not automatically a swindle. It is a real product with a real use, and for some trips it is the correct buy. But it cannot be compared with a metered plan on price alone, and the number that decides whether it suits you is usually buried.

Every unlimited plan has a fair-use threshold: the point where full speed ends. It might be 1 GB per day, or 10 GB for the period, or an unstated figure the provider reserves the right to apply.

Find that number before you buy, and compare it against what you actually use. An unlimited plan with a 1 GB daily threshold is a 7 GB weekly plan wearing a better word — and if a 5 GB plan costs less, the comparison is not close.

The post-threshold speed is the second number to look for, and it decides whether the plan is still usable or merely still connected:

• 512 kbps to 1 Mbps — maps, messaging and email work; video does not. Tolerable.
• 128 kbps to 256 kbps — text-based things load slowly and everything else effectively stops.
• Unstated. Assume the lower band, because a provider confident of the figure tends to publish it. How throttling works covers the mechanism.

In regulated markets, disclosure is not optional. US broadband providers, including mobile ones, must publish a consumer label stating the data allowance and linking to a network management policy that covers throttling.

The UK constrains the word rather than the label: the CAP advice on unlimited claims in broadband and telecoms ads allows "unlimited" only where any limitation the provider imposes is moderate and would not surprise the average customer.

The EU takes a third approach and writes the threshold into law. Under the roaming regulation that runs to 2032, an operator may apply a fair use limit to a domestic plan used abroad, and that limit has to follow a published formula rather than a number of its choosing — which is why an unlimited home plan behaves differently once you cross a border.

Travel eSIM resellers generally sit outside those regimes. Nobody compels them to state a threshold, which is why some do and some leave it to the terms of service. The absence of a published figure is itself information.

Three cases, and they are genuine rather than grudging:

1. 1A long trip where you cannot predict usage and would otherwise top up repeatedly.
2. 2Heavy video or hotspot use where even a large metered plan would run out, and slow beats nothing.
3. 3Any trip where you would rather not think about it. Paying a premium to stop monitoring a counter is a legitimate purchase.

What it is not good for is a short trip with ordinary usage. There, a metered plan is almost always cheaper and never throttled.

We rank on price per GB, and an unlimited plan has no GB figure to divide by — so it cannot be placed honestly in a list sorted that way. We show them with their threshold where the provider states one, and say so where they do not, rather than inventing a number to make the sort work. Plans by destination, and the ranking rules in full.