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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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Three
Three SIM Deal

12 month contract

unlimited minutes

unlimited texts

120GB

5G data

£12.00

a month

was £18.00

(prices may change during contract)
Exclusive deal
iD Mobile
iD Mobile SIM Deal Uses Three's network

24 month contract

unlimited minutes

unlimited texts

150GB

5G data

£10.00

a month

Data Rollover & Up to 30GB roaming in 50 countries
iD Mobile
iD Mobile SIM Deal Uses Three's network

12 month contract

unlimited minutes

unlimited texts

120GB

5G data

£10.00

a month

Data Rollover & Up to 30GB roaming in 50 countries
iD Mobile
iD Mobile SIM Deal Uses Three's network

1 month contract

unlimited minutes

unlimited texts

110GB

5G data

£10.00

a month

Data Rollover & Up to 30GB roaming in 50 countries
iD Mobile
iD Mobile SIM Deal Uses Three's network

1 month contract

unlimited minutes

unlimited texts

100GB

5G data

£10.00

a month

Data Rollover & Up to 30GB roaming in 50 countries
Talkmobile
Talkmobile SIM Deal Uses Vodafone's network

1 month contract

unlimited minutes

unlimited texts

120GB

5G data

£11.95

a month

Free EU Roaming
iD Mobile
iD Mobile SIM Deal Uses Three's network

24 month contract

unlimited minutes

unlimited texts

300GB

5G data

£12.00

a month

Data Rollover & Up to 30GB roaming in 50 countries
iD Mobile
iD Mobile SIM Deal Uses Three's network

12 month contract

unlimited minutes

unlimited texts

250GB

5G data

£12.00

a month

Data Rollover & Up to 30GB roaming in 50 countries
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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