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100GB Data SIM Only deals

Compare 100GB data SIM Only plans and find the best deal for you.

  • Compare plans on all UK networks
  • Filter by contract length and cost
  • Enjoy superfast speeds with 5G

Need more data? Have you considered an unlimited data SIM?

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Recommended
Micro SIM card

Triple SIM (Standard, Micro and Nano)

iD Mobile
110GB Data Unlimited Mins Unlimited Texts
£10.00 a month 1 month contract iD Mobile iD Mobile See Deal
Data Rollover & Roaming 5G
Recommended
Micro SIM card

Triple SIM (Standard, Micro and Nano)

Three
120GB Data Unlimited Mins Unlimited Texts
£12.00 a month 12 month contract Three Three See Deal
5G
Recommended
Micro SIM card

Triple SIM (Standard, Micro and Nano)

Smarty
100GB Data Unlimited Mins Unlimited Texts
£12.00 a month No contract Smarty Smarty See Deal
EU roaming 5G
Recommended
Micro SIM card

Triple SIM (Standard, Micro and Nano)

Vodafone
200GB Data Unlimited Mins Unlimited Texts
£13.00 a month 24 month contract Vodafone Vodafone See Deal
6 months half price 5G
Recommended
Micro SIM card

Triple SIM (Standard, Micro and Nano)

iD Mobile
250GB Data Unlimited Mins Unlimited Texts
£16.00 a month 12 month contract iD Mobile iD Mobile See Deal
Free £50 Currys gift card Data Rollover & Roaming 5G
Recommended
Micro SIM card

Triple SIM (Standard, Micro and Nano)

GiffGaff
500GB Data Unlimited Mins Unlimited Texts
£20.00 a month 18 month contract GiffGaff GiffGaff See Deal
120GB after 6 months Fixed prices until end of 2023 5G
Micro SIM card

Triple SIM (Standard, Micro and Nano)

Lycamobile
100GB Data Unlimited Mins Unlimited Texts
£7.00 a month No contract Lycamobile Lycamobile See Deal
£20 after 3 months 5G
Micro SIM card

Triple SIM (Standard, Micro and Nano)

Talkmobile
120GB Data Unlimited Mins Unlimited Texts
£11.95 a month 1 month contract Talkmobile Talkmobile See Deal
Free EU Roaming 5G
Mobile networks may increase prices in line with the consumer price index each year. Please check individual network's terms before purchasing.

100GB is a popular data allowance and it’s all the data most users should need, so it’s a great balance between having a reassuring amount, and not paying for unlimited data.

Below you’ll find more details about how far 100GB will go, along with other considerations when choosing a 100GB of data SIM Only plan.

How far will 100GB of data go?

With 100GB of data you could watch around 30 hours of high-quality streamed video. So that’s enough for roughly 1 hour every day. But if you watch in normal or low quality then you can stream far, far more, with Netflix’s low-quality setting allowing for around 600 hours of streaming with 100GB of data.

Most other use cases consume far less data than video, so for music streaming you’re looking at around 680 hours, for video calling and online gaming you should get upwards of 333 hours, and most other use cases are virtually unlimited.

For more in-depth information, check out our ‘is 100GB of data enough?’ guide, or take a look at our data allowances guide for information on how far other amounts of data will go.

Which networks offer 100GB SIM deals?

The selection of networks offering 100GB SIM Only deals will change over time, but usually a large number do as this is a popular allowance, and you can see all the current options above.

Which network should I choose?

When choosing a network, one of the main things to consider is the cost, and you can easily filter by price by using the cost dropdown above.

4G is widespread on all networks now, but if you’re interested in 5G then you should also consider what each network’s 5G coverage is like. For that, check out our coverage guides.

You can also see other details of each network in those guides, such as any extras they offer, so give that a read if you want more than just your allowances.

Why choose a SIM Only contract?

SIM Only contracts are typically a lot cheaper than buying a phone on contract, since you’re just charged for your allowances – not a new device.

On top of that, you can also pick from a range of durations, with many networks letting you select a 30-day rolling plan. So you don’t need to commit to a long duration – though longer-term plans often have cheaper monthly prices.

Is 5G included?

5G now comes as standard with the vast majority of SIM Only plans. However, there are still some networks that either don’t offer 5G as standard or don’t offer it at all. To be sure you’re getting a 5G plan, just tick the ‘only show 5G deals’ box above, or look out for the word ‘5G’ next to each plan.

Can I get a 100GB SIM deal with no credit check?

A number of networks offer SIM Only deals without a credit check, though whether they’ll have a plan with 100GB of data will vary. To check, head to our no credit check SIM Only deals page.

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