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SIM only · By data

Cheapest SIM only deals with 100GB or more

Plenty for heavy streaming and hotspotting. Often only a pound or two less than unlimited, so check both.

11 deals from 8 providers. Cheapest: Talkmobile 100GB 12-month at £4.98 a month.

Providers
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Contract
Any length

11 deals

Talkmobile

100GB 12-month

  • 100GB data
  • 12 months
  • Vodafone network
  • 5G
  • EU roaming included
  • eSIM

Half price for the first 3 months.

Check Vodafone coverage at your postcode

£4.98/mo

  • then £9.95 from Jan 2027

Total cost: £104 · avg £8.71/mo

May rise mid-contract. Amount not stated.

View deal

Checked 26 Oct 2026

Lyca Mobile

Mega Plus 120GB

  • 120GB data
  • 1-month rolling
  • EU roaming included
  • eSIM

Includes 100 international minutes.

Check coverage at your postcode

£10/mo

Price can change with notice. Leave any time.

View deal

Checked 26 Oct 2026

VOXI

300GB + unlimited social, music and video

  • 300GB data
  • 1-month rolling
  • Vodafone network
  • 5G
  • Roaming pass needed
  • eSIM

300GB is a 3x data offer until 26 November, then 100GB.

Check Vodafone coverage at your postcode

£20/mo

Rolling monthly. Leave any time.

View deal

Checked 26 Oct 2026

O2

100GB Classic

  • 100GB data
  • 24 months
  • O2 network
  • 5G
  • EU roaming included
  • eSIM

Offer price: £20 a month if you join by 4 November.

Check O2 coverage at your postcode

£20/mo

  • then £22.50 from Apr 2027
  • then £25 from Apr 2028

Total cost: £540 · avg £22.50/mo

View deal

Checked 26 Oct 2026

Vodafone

100GB

  • 100GB data
  • 24 months
  • Vodafone network
  • 5G
  • EU roaming extra
  • eSIM

Download speed capped at 100Mbps.

Check Vodafone coverage at your postcode

£24/mo

  • then £26.50 from Apr 2027
  • then £29 from Apr 2028

Total cost: £636 · avg £26.50/mo

View deal

Checked 26 Oct 2026

What happens when you click View deal: you go to the provider's own site to check your address and order. Your contract and any problems with installation or billing are with the provider. MoneyRoute never takes payment or your details.

Living with 100gb+ data

100GB or more is enough for heavy streaming, video calls and using your phone as a hotspot for a laptop. Many people on these plans never get near the limit.

Look at the price gap to unlimited: it's sometimes only a pound or two a month.

Cheapest 100gb+ plan from each provider

ProviderPlanNetworkContractMonthlyEU roaming
Talkmobile 100GB 30-day Vodafone Rolling £9.95 Included
iD Mobile 100GB 1-month Three Rolling £12 Included
Lyca Mobile Mega Plus 120GB Not stated Rolling £10 Included
SMARTY 100GB Three Rolling £12 Included
giffgaff 100GB rolling O2 Rolling £20 Included
VOXI 300GB + unlimited social, music and video Vodafone Rolling £20 Pass needed
O2 100GB Classic O2 24 months £20 Included
Vodafone 100GB Vodafone 24 months £24 Daily charge

How far does that data go?

Hours of Netflix each allowance covers in a month, using Netflix's figures of up to 1GB an hour in standard definition, 3GB in HD and 7GB in 4K. Messaging, maps and browsing use far less.

DataStandard definitionHD4K
100GB 100 hours 33 hours 14 hours
120GB 120 hours 40 hours 17 hours
300GB 300 hours 100 hours 42 hours

100GB+ SIM only questions

Which is the cheapest 100gb+ SIM only deal?

Talkmobile 100GB 12-month at £4.98 a month on a 12-month contract. Note: Half price for the first 3 months.

Should I choose a rolling plan or a contract?

6 of the 11 plans here roll monthly, so you can leave or change any time. Contracts can be cheaper for the same data, but 3 of the plans here have rises during the contract, shown on each deal.

Do these plans include EU roaming?

9 of the 11 plans include EU roaming, usually with a fair use limit. The others charge a daily fee or need a pass. Use the roaming filter above to see only plans that include it.

Is a budget brand as good as a big network?

Budget brands run on one of the four networks, so the coverage is the same as that network's. Each plan above shows which network it uses.

Other data amounts

Data use figures: Netflix: how much data does Netflix use?