Unlimited data sounds like a dream—browse, stream, and download as much as you want without worrying about running out. But is it really unlimited? In the UK, the answer is more complicated than you might expect.
Many mobile networks advertise unlimited data plans, but these often come with Fair Use Policies (FUPs) that set limits on how much data you can use before your service might be affected. Let’s break down what this means, what restrictions to expect, and what users are saying.
What Does “Unlimited Data” Actually Mean?
Logically, unlimited means no limits. You should be able to use endless amounts of data, right? Unfortunately, for most UK networks, unlimited data means you get a very large data allowance—usually around 600GB per month—before they might slow your connection speed or investigate your usage.
For example:
- EE, Vodafone, and Asda Mobile usually set a fair use limit at about 600GB.
- O2 allows roughly 650GB.
- Lyca Mobile may have a lower limit, sometimes around 450GB.
- Other networks have similar policies with slight variations.
While these limits are very high and most users won’t come close, they aren’t truly unlimited.
Why Do Networks Set These Limits?
Networks use fair use limits to keep things fair for everyone. If a handful of users consumed unlimited data without restriction, it could slow down the entire network for others. These policies ensure the best possible experience for the majority.
Roaming Limits and Restrictions
A crucial detail is that these “unlimited” plans often only apply to data used within the UK. When you roam abroad, your data allowance is usually much smaller, sometimes between 5GB to 50GB, depending on your provider.
Additionally, many networks restrict tethering (sharing your phone’s data with other devices) to a certain number of devices or data limits.
What Users Say About Unlimited Data
“I assumed ‘unlimited’ meant unlimited, but after using over 600GB twice, my speed was slowed down for a few days. Still, it’s enough for my needs.” — Sophie, Leeds
“My VOXI plan is great in the UK, but when I travel abroad, I have to keep an eye on my roaming data allowance or risk extra charges.” — Raj, Birmingham
“Fair use policies aren’t always easy to find, so it’s good to know the limits before you sign up.” — Emily, Manchester
How Different Networks Handle Fair Use
| Network | UK Data Fair Use Limit | Roaming Data Limit | Tethering Limits |
|---|---|---|---|
| EE | 600GB | 50GB | Max 12 devices |
| O2 | 650GB | 25GB | Max 12 devices |
| Vodafone | 600GB | 25GB | Speed caps on some plans |
| Lyca Mobile | 450GB (some plans) | 50–35GB | Varies |
| Asda Mobile | 600GB | 5GB | Not specified |
| Tesco Mobile | No specific UK limit | Must spend more time in UK | Phone or tablet use only |
| Sky Mobile | Reasonable use | Reasonable use | Charges for roaming apply |
The Bottom Line: What You Need to Know
Unlimited data plans in the UK offer plenty of data for most users, but they aren’t truly endless. If you use a lot of data each month or travel often, check your provider’s fair use and roaming policies carefully.
For most people, these plans work well and provide freedom from worrying about running out of data. Just remember that “unlimited” usually means very high data with fair usage boundaries to keep the network running smoothly for everyone.
If you want to avoid surprises, always read the small print before signing up. Understanding fair use means you can enjoy your unlimited plan without unexpected slowdowns or charges.
