URL: https://esimworld.co.uk/esim-unlimited/
Source: eSIM World (esimworld.co.uk)
Author: Nadezhda Semenova, entrepreneur, co-founder of the Trippy travel service, https://esimworld.co.uk/author/
Updated: 26 October 2026

# What a travel eSIM daily data limit really means: full speed, then 1 Mbps

A travel eSIM sold as "unlimited" usually gives a set amount of data a day at full speed, for example 5 GB, then 1 Mbps. Our USA plans without a GB total work that way; our Tunisia plans give 3 GB a day at full speed, then 1 Mbps. The plan keeps working after the limit, at a speed that suits messages and maps; a low-quality one-to-one video call can fit, HD video needs more.

This site is not affiliated with any of the networks mentioned here; we sell eSIMs. [How we compare](https://esimworld.co.uk/how-we-compare/)

You may not need a data plan with a daily limit at all. If your trip is a week in Europe and your UK plan includes roaming, check [what each UK network includes](https://esimworld.co.uk/roaming/europe/) first. Light users are often better off with a fixed GB total, which has no daily rule to trip over.

## What does the label on a travel eSIM with no GB total mean?

On a travel eSIM, "unlimited" usually means a daily allowance, for example 5 GB a day at full speed, then a slower speed. The common shape is a number of GB each day, then a speed cut until the day resets (our reading of the plan cards sellers publish, 24 October 2026).

The cut is the part to read. Sellers publish it in different places:

| Seller type | What the plan card says (24 October 2026) |
|---|---|
| A large global seller | 1 Mbps after 3 to 5 GB a day |
| A network-branded travel plan | 5 GB a day, then 5 Mbps |
| A regional seller | 5 or 10 GB a day |
| One seller | "Fair Use Policy applies", no figure on the card |
| Four sellers | no limit stated on the card |
| One seller | data not limited by volume, hotspot limited |

Source: plan cards as published by each seller, collected on 24 October 2026. We do not name other sellers, and a card that states no limit may still have one in its terms: read the terms before you buy.

Reviews describe the same gap between the label and the terms. On Trustpilot UK, one reviewer wrote on 20 September 2026: "Their unlimited usage actually has a 'fair usage' limit of 2GB, before they throttle your speed so much you can't load Google." That is one person's experience of one plan, not a finding about every seller.

## What happens after the daily limit runs out?

After the daily limit your connection keeps working at a lower speed, and the full-speed allowance returns on the next reset. On our plans without a GB total that speed is 1 Mbps (plan data checked on 24 October 2026).

### What 1 Mbps is enough for

What 1 Mbps does in practice is a sum, and the sum is ours. 1 Mbps is 0.125 MB a second, so 450 MB an hour is the theoretical ceiling if the link runs flat out for the whole hour; it is not a measured speed and not a promise for any plan. That is enough for messages, a boarding pass, a map that has already loaded. Streaming that starts fast and HD video need more.

### Video calls at 1 Mbps

Video calls depend on the app and the mode. Zoom's web app recommends 600 kbps up and down for high-quality one-to-one video and 1.2 Mbps for 720p HD; for group calls it gives 1.0 Mbps up and 600 kbps down for high quality, and 2.6 Mbps up and 1.8 Mbps down for 720p ([Zoom](https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0058323), checked on 26 October 2026). Microsoft gives 150 kbps up and down as the minimum for a one-to-one Teams video call, at up to 240p, and 1,500 kbps as recommended for up to 1080p ([Microsoft](https://learn.microsoft.com/en-us/microsoftteams/prepare-network), checked on 26 October 2026). So a low-quality one-to-one call can fit under 1 Mbps, while 720p HD and HD group calls need more. These are the apps' figures, not a promise for our plans. Our plan data gives one figure, 1 Mbps, with no separate upload figure, and a call also suffers from delay and lost packets, which depend on the signal and the local network.

### Our plans with a daily limit

| Our plan data | Full speed each day | After the limit |
|---|---|---|
| USA plans with no GB total, 3 to 30 days | 5 GB a day | 1 Mbps |
| Tunisia plans with no GB total | 3 GB a day | 1 Mbps |

Source: our plan listings, checked on 24 October 2026. See [the USA plan](https://esimworld.co.uk/sim-card/united-states/) and [the Tunisia plan](https://esimworld.co.uk/sim-card/tunisia/) for the networks and days each one covers.

### What the UK advertising rules say

The advertising rules look at the same thing. The Committee of Advertising Practice, which writes the UK's advertising code, says such claims are "likely to be acceptable if" passing a threshold costs the user nothing more and takes no service away, and if the speed limits are "moderate only and are clearly explained". It cites a 50% slow-down as "more than moderate" in a 2013 ruling ([CAP guidance, 21 May 2025](https://www.asa.org.uk/advice-online/broadband-and-telecoms-unlimited-claims.html)). We read that as a reason to print the limit beside the plan name, and we do not claim a ruling on 1 Mbps.

## How does fair use work on UK networks abroad?

Fair use on UK networks abroad is a cap on the roaming data in your plan, from 5 GB to 35 GB depending on the network, and every one is a figure the network publishes. Past it you pay per MB or per GB, or you stop having data. The table lists the caps, each with its own condition.

| Network | Roaming cap | Past the cap |
|---|---|---|
| O2 | 25 GB in its Europe Zone, if your UK allowance is over 25 GB | buy a data Bolt On |
| Vodafone | 25 GB on pay monthly plans | £3.84 a GB |
| Three | 12 GB in Go Roam destinations, pay monthly | 0.3p a MB |
| giffgaff | 5 GB per plan, not per month or per visit | 10p a MB |
| SMARTY | 12 GB in the EU | pass of £3 for 1 day or £7 for 3 days on plans over 12 GB |
| Lyca Mobile | 12 GB, or a 35 GB fair-use cap on its "Unlimited data" plans | 15p a MB |

Sources, each checked on its network's date: [O2](https://www.o2.co.uk/eu-roaming) (24 October 2026); [Vodafone](https://www.vodafone.co.uk/mobile/global-roaming) (24 October 2026); [Three Go Roam](https://www.three.co.uk/support/roaming-and-calling-abroad/roaming-abroad/go-roam) (24 October 2026); [giffgaff](https://help.giffgaff.com/en/articles/229458-everything-you-need-to-know-about-roaming-in-the-eu) (24 October 2026); [SMARTY price guide](https://cdn.smarty.co.uk/files/SMARTY-Price-Guide.pdf) (24 October 2026); [Lyca Mobile](https://www.lycamobile.co.uk/en/euroaming/) (24 October 2026).

Two details sit beside the caps. [Vodafone](https://esimworld.co.uk/roaming/vodafone/)'s £3.83 a GB on the same page is a separate long-stay charge, not the fair-use rate. The Republic of Ireland sits outside Three's 12 GB limit.

These networks sell you a plan with a monthly allowance, so the cap applies to your own number and your own bill. A travel eSIM is data only and the daily rule is the whole product. They are different things, and the table says nothing about which one costs less for your trip.

## How much data do you need on a trip?

Work out the total first ([our data calculator](https://esimworld.co.uk/how-much-data-do-i-need/) helps), then see whether a daily limit helps or hurts. Our USA and Tunisia plans also come in fixed totals of 1 GB for 7 days, 2 GB for 15 days, and 3, 5, 10 and 20 GB for 30 days. A plan with a daily limit instead of a total suits a day when you use a lot at once.

Two sums show the difference, both ours. On a 7-day trip, 5 GB a day at full speed allows up to 35 GB in total, and you reach it only if you use 5 GB every day. If you use 1 GB on six days and 8 GB on one, a 5 GB daily limit cuts the heavy day at 5 GB and the rest of that day runs at 1 Mbps, while a 20 GB total would not have cut anything (that week uses 14 GB in all).

Three questions settle most choices:

- Do you need full speed all day, or only for a few hours? Steady use under the daily figure never meets the limit.
- Do you share the connection with other phones? Hotspot rules vary by plan, and our listings do not state one for the USA or Tunisia plans, so check before you rely on it.
- Is your use spiky? One heavy day (a download, a video call, a hotel with weak Wi-Fi) is when a daily limit bites.

Turkey: buy and install your eSIM before you travel. eSIM shops, including ours, may not open on Turkish networks. See [our Turkey page](https://esimworld.co.uk/sim-card/turkey/).

## Frequently asked questions

### Is a travel eSIM with no GB total really without limits?

No. A travel eSIM with no GB total usually sets a daily full-speed figure, such as 5 GB a day, then 1 Mbps. Find that number on the plan card or in the terms, and treat a plan with no number at all as a plan to ask about.

### Can you use a hotspot on a daily-limit eSIM?

It depends on the plan. Our USA and Tunisia listings state no hotspot rule, so we make no promise. Check the plan page before you buy, and see [the data roaming help](https://esimworld.co.uk/help/data-roaming/) for the phone settings.

### Do you pay more if you pass the daily limit?

Our plan data describes a drop in speed to 1 Mbps, not an extra charge. UK network plans work differently, with charges per GB or per MB past a cap.

*Sources are linked in the text; reviewed by Nadezhda Semenova. For the terms of any plan, check with the seller or network.*