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Unlimited data SIM only deals

At Olimit, we help you compare the best unlimited SIM Only deals — all in one place.
Keep your phone, ditch the restrictions.

If you want no limits on how much data you use, an unlimited data SIM Only deal is the smart choice.

Most UK networks now offer unlimited plans to suit different budgets, so you can stream, scroll, and stay connected without worrying about caps.

Olimit Tips & Tricks

Do I need unlimited data SIM Only deal?

Unlimited data SIMs offer complete freedom, but they often come at a higher monthly cost. Before you commit, think about your usage. The average UK mobile user only uses around 10GB of data per month, so if you mainly browse, message, and stream occasionally, a smaller data plan might save you money.

However, if you’re always streaming Netflix, gaming on the go, using your phone as a hotspot, or working remotely, an unlimited data plan could be the hassle-free option you need. At Olimit, we help you compare unlimited and capped SIM Only deals, so you can find the best match for your data habits and budget.

Can I use my unlimited data SIM abroad?

It depends on the network. Look for in the deal listings below — it will show you how much roaming data is included and which countries are covered.

Most UK providers include EU roaming with unlimited data SIMs, but your usage abroad is usually capped — often between 12GB and 35GB per month. Some networks also charge extra for roaming outside the EU, like in the USA, Australia, or Asia.

Before you travel, always check your network’s roaming fair usage policy and whether your destination is included. At Olimit, we make it easy to compare unlimited SIM Only deals with roaming included, so you can stay connected abroad without unexpected charges.

Promoted

Lyca Mobile Sim Deal

Uses EE's network

eSIM

Available

Unlimited

data

£12.50

for 1 Month,

then £25

No Contract

31 Roaming Destinations

35GB

Austria 🇦🇹
Belgium 🇧🇪
Bulgaria 🇧🇬
Croatia 🇭🇷
Cyprus 🇨🇾
Czech Republic 🇨🇿
Denmark 🇩🇰
Estonia 🇪🇪
Finland 🇫🇮
France 🇫🇷
Germany 🇩🇪
Greece 🇬🇷
Hungary 🇭🇺
Iceland 🇮🇸
India 🇮🇳
Ireland 🇮🇪
Italy 🇮🇹
Latvia 🇱🇻
Liechtenstein 🇱🇮
Lithuania 🇱🇹
Luxembourg 🇱🇺
Malta 🇲🇹
Netherlands 🇳🇱
Norway 🇳🇴
Poland 🇵🇱
Portugal 🇵🇹
Romania 🇷🇴
Slovakia 🇸🇰
Slovenia 🇸🇮
Spain 🇪🇸
Sweden 🇸🇪

100 International Minutes

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Best Unlimited Data SIM Only Deals in the UK

All-you-can-use mobile data plans with no caps — perfect for streaming, hotspotting, remote work, and non-stop scrolling.

Why Choose Unlimited Data?

If you’re tired of running out of data, or you rely heavily on your mobile connection for work, travel, or entertainment, unlimited data gives peace of mind:

Stream in HD without worry — Netflix, YouTube, Spotify, all on the go.
Use your phone as a Wi-Fi hotspot — share data with your laptop or tablet.
No mid-month slowdowns — stay connected at full speeds (on premium plans).
Great for remote work, gaming, and digital nomads needing constant access.

Use Case: Unlimited Data for Work & Travel

A remote worker from Manchester regularly travels across the UK and needs reliable high-speed data to hotspot their laptop. They switched to Three for its uncapped unlimited plan — full-speed 5G in major cities, with no throttling on hotspot usage. It’s made working on the go seamless.

Who Should Get Unlimited?

Heavy streamers watching videos or gaming daily
Remote workers & freelancers needing hotspot data
Digital nomads living off mobile internet
Families sharing a single data plan or SIM router users

Top UK Unlimited Data SIM-Only Deals (30-Day)

Compare the best monthly unlimited plans. Many offer 5G, eSIM options, and no long-term commitment.

Provider	Network	Speed Estimate	eSIM	Highlights
Three	Three	Avg: 100–140 Mbps 5G: Up to 400 Mbps	✅	No speed cap, 5G included, great for hotspot use
Voxi	Vodafone	Avg: 60–100 Mbps 5G: Up to 300 Mbps	✅	Unlimited social media + video apps included
Lebara	Vodafone	Avg: 60–100 Mbps 4G-only	No	Truly unlimited data, international minutes
Giffgaff	O2	Avg: 20–50 Mbps 5G: Up to 150 Mbps	✅	Goodybags with 650GB FUP (Fair Use Policy)
Lyca	EE	Avg: 80–150 Mbps 5G: Up to 500 Mbps (in coverage areas)	✅	Superfast EE network, roaming + global mins

Know Before You Buy: Fair Use & Speed Caps

Not all “unlimited” plans are created equal — here’s what to check:

Fair Use Policy (FUP): Some plans slow down after 450GB+ per month.
Hotspot allowance: Some networks limit how much tethering you can do (e.g. Giffgaff caps it, Three doesn’t).
5G speeds: Available only in supported areas and on compatible devices.
EU roaming: Check if unlimited usage carries over while travelling. Look for in the deal listings.

How to Activate Your Unlimited SIM

Compare unlimited plans at Olimit.co.uk.
Choose eSIM or physical SIM delivery.
Scan the eSIM or insert the SIM into your phone.
Enjoy endless data, calls, and texts right away.

Why Compare Unlimited Plans on Olimit?

✅ Instant eSIM activation or free SIM delivery
✅ Unbiased comparison of true unlimited offers
✅ Real speeds and network insights, not just marketing
✅ Best for travellers, remote workers, and UK locals alike

FAQs About Unlimited SIM Plans

Do unlimited plans really have no limits?

Most are truly unlimited, but some (like Giffgaff, Lyca) include a Fair Use Policy.

Can I use unlimited data for hotspot?

Yes — though some providers (like Voxi) may limit tethering speeds or usage. Three and Lyca are more generous.

Which unlimited plan is fastest?

Lyca (on EE) and Three tend to offer the fastest real-world speeds in most areas — up to 400–500 Mbps on 5G. – Tested by Olimit

Can I roam in the EU with unlimited data?

Yes, but there’s usually a roaming cap (e.g. 20–30GB in Europe). Check the plan’s roaming terms or look for this icon:

Is unlimited data worth it?

If you regularly use over 30GB/month or hotspot often, unlimited plans pay off. Otherwise, a capped 30GB–50GB plan might be more cost-effective.

Choose Your Unlimited Plan

See the best unlimited data SIM deals and get connected today — with instant eSIM or fast UK delivery.

Sim Only Deals

Network Providers

Networks

Unlimited data SIM only deals

Olimit Tips & Tricks

List of SIM Only deals

Best Unlimited Data SIM Only Deals in the UK

Why Choose Unlimited Data?

Use Case: Unlimited Data for Work & Travel

Who Should Get Unlimited?

Top UK Unlimited Data SIM-Only Deals (30-Day)

Know Before You Buy: Fair Use & Speed Caps

How to Activate Your Unlimited SIM

Why Compare Unlimited Plans on Olimit?

FAQs About Unlimited SIM Plans

Do unlimited plans really have no limits?

Which unlimited plan is fastest?

Can I roam in the EU with unlimited data?

Is unlimited data worth it?

Choose Your Unlimited Plan

Get Updates And Stay Connected

Compare Best Deals

Coverage

Our Site

© Olimit All Rights Reserved 2025

Sim Only Deals

Network Providers

Networks

Unlimited data SIM only deals

Olimit Tips & Tricks

List of SIM Only deals

Best Unlimited Data SIM Only Deals in the UK

Why Choose Unlimited Data?

Use Case: Unlimited Data for Work & Travel

Who Should Get Unlimited?

Top UK Unlimited Data SIM-Only Deals (30-Day)

Know Before You Buy: Fair Use & Speed Caps

How to Activate Your Unlimited SIM

Why Compare Unlimited Plans on Olimit?

FAQs About Unlimited SIM Plans

Do unlimited plans really have no limits?

Which unlimited plan is fastest?

Can I roam in the EU with unlimited data?

Is unlimited data worth it?

Choose Your Unlimited Plan

Get Updates And Stay Connected

Compare Best Deals

Coverage

Our Site

© Olimit All Rights Reserved 2025

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